CBSE > Class 07 > Mathematics | CBSE Board | Homework Help

CP of first pen=20
G%=5%
Sp=(100+G%)/100×Cp
= 105/100×20
=21
Cp of Second pen=20
L%=5%
Sp=(100-L%)/100×Cp
=95/100×20
=19
Total cp=20+20=40
Total sp=21+19=40.
So, Cp=Sp there is no loss and no gain.

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16*2n+1-4*2n 16*2n+2-4*2n+2

Posted by Guriya Kumari 6 years, 2 months ago

CBSE > Class 07 > Mathematics

1 answers

Aadi Prajapati 6 years, 2 months ago

576n(square)+120n+4

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Picture of making activity on ch perimeter and area

Posted by Usman Mohmad 6 years, 2 months ago

CBSE > Class 07 > Mathematics

0 answers

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My mother says in her childhood petrol was rs 1 a litre. It is rs 52 per litre today. By what percentage has the price gone up

Posted by Sanskar Gupta 6 years, 2 months ago

CBSE > Class 07 > Mathematics

2 answers

Aadi Prajapati 6 years, 2 months ago

5100%

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Anjana Kumari 6 years, 2 months ago

5200%

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2x - 1 /3 - 6x - 2/5

Posted by Dhruvin Gandhi 6 years, 2 months ago

CBSE > Class 07 > Mathematics

1 answers

Aadi Prajapati 6 years, 2 months ago

-8x+1/15

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A shopkeeper earns a profit of Rupees 1 by selling a pencil and a loss of 20% by selling an eraser in a given day he had lots of rupees 10 and on this day he sold 35 pencils how many years was sold on this day next day he on profit of rupees 25 on this day he sold hundred days how many pencils did he sell

Posted by Prachi Lahodkar 6 years, 2 months ago

CBSE > Class 07 > Mathematics

0 answers

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What is "Transwersal" ?

Posted by Neeraj Pandey 6 years, 2 months ago

CBSE > Class 07 > Mathematics

3 answers

Kirti Raghav 6 years, 2 months ago

First your spelling is mistaked TRANSVERSAL- it is a line that intersects two or more line at distinct

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Prachi Lahodkar 6 years, 2 months ago

Transversal is a line that intersects two or more lines at distinct.

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Yogita Ingle 6 years, 2 months ago

The line which intersects two distinct lines in a plane at two distinct points is called a transversal.

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Prove angle sum property of a triangle and exterior angle property of a triangle using paper cutouts

Posted by N27 Swathi 6 years, 2 months ago

CBSE > Class 07 > Mathematics

1 answers

Ameya N K 6 years, 2 months ago

Cut out a triangle. Cut out all it's angles. Draw a 180 degree angle. Paste all the angle cutouts. We can see that all angles fit directly into the 180 degree angle. Therefore, the sum of all angles of a triangle is 180 degree.

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Solve this sum a2b(a-b2)+ab2(4ab-2a2)-a3b(1-2b)

Posted by Vikas Kumar 6 years, 2 months ago

CBSE > Class 07 > Mathematics

1 answers

Ayushree Raj 6 years, 2 months ago

what is value of ab?

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Is it possible to have a triangle with the following sides 1. 2cm,3cm,5cm

Posted by Divanshi Khushi 6 years, 2 months ago

CBSE > Class 07 > Mathematics

2 answers

Saniya Shah 6 years, 2 months ago

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Neeraj Pandey 6 years, 2 months ago

5cm+3cm>1.2cm 5cm+1.2cm>3cm 1.2cm+3cm<5cm so, it is not a triangle

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Smallest whole number

Posted by Anil Kareni 6 years, 2 months ago

CBSE > Class 07 > Mathematics

10 answers

Pallavi Kumari 6 years, 2 months ago

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Saniya Shah 6 years, 2 months ago

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Siri Alavala Puppy 6 years, 2 months ago

It is 0??

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Manisha Sawant 6 years, 2 months ago

0 is the correct answer and after that 1

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Sonali Nanda... 6 years, 2 months ago

Its 0

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Ayushree Raj 6 years, 2 months ago

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Vikas Kumar 6 years, 2 months ago

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Priyansh Sharma 6 years, 2 months ago

0 is the smallest whole number

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Parveen Kumar 6 years, 2 months ago

0 is the smallest whole number

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Harsh Singh 6 years, 2 months ago

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A river 3m deep and 40m wide is flowing at the rate of 2km per hour. How much water will fall into the sea in one minute

Posted by Girish Bohra 6 years, 2 months ago

CBSE > Class 07 > Mathematics

1 answers

Gaurav Seth 6 years, 2 months ago

Height = 3 m
Breadth = 40 m
length = 2km = 2000 m
time = 1 h = 60 mins
water / hour = 2000/ 60 = 100/3
Volume = l * b * h = 100/3 * 3 * 40 = 4000 m³ = 4000 * 10³ liters

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What rate gives ₹290 as interest on a sum of₹58,000 in 2 years

Posted by Dikshita Singhal 6 years, 2 months ago

CBSE > Class 07 > Mathematics

1 answers

Harsh Mishra 6 years, 2 months ago

Answer : Since we know that, SI = P×R×T/100

Therefore, Rs. 290 = 58000 × X × 2/100

Rs. 290 = 580 × 2X

290/ 580 = 2X

1/2 = 2X

1/2×2=X

1/4 = X

0.25 = X, where X = Rate of Interest.

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Express 2.5:6.5:8

Posted by Anshul Mangla 6 years, 2 months ago

CBSE > Class 07 > Mathematics

1 answers

.. ... 6 years, 2 months ago

We can write the given ratios as = (25/10:65/10:80/10) now all the 10's in denominator get cancel after cancellation, the form is = (25:65:80) in the above ratio 5 is common ∴simplest form is=5:13:16

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Who invented maths

Posted by Abhinav Lohiya 6 years, 2 months ago

CBSE > Class 07 > Mathematics