CBSE > Class 09 > Mathematics | CBSE Board | Homework Help

surface area of cylindrical vessel open at the top = curved surface area of cylinder + area of base
= 2pi . r . h + pi . r²
= pi . r ( 2h + r )
= 22/7x0.07 ( 2x1 + 0.07 )
surface area = 0.4554 m²=4554cm²
cost of 100 cm² of metal sheet = Rs. 25
cost of 1 cm² of metal sheet = Rs. 25/100
cost of 4554 cm² of metal sheet
= Rs. 25 ×4554 / 100
= Rs. 1138.5

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Chapter 6 an angle which is greater than 180 and less than 360 is

Posted by Anushkar Choudhary 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Shreya Raj 5 years, 3 months ago

reflex angle?

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Write angle sum property of a triangle

Posted by Diya Sehgal 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Diya Mundra 5 years, 3 months ago

180

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Yogita Ingle 5 years, 3 months ago

Angle sum property of triangle states that the sum of interior angles of a triangle is 180°.

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(-1

Posted by S Parameswaran 5 years, 3 months ago

CBSE > Class 09 > Mathematics

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If x=√2+1÷√2-1, y=√2-1÷√2+1. Find x2+y2 +xy

Posted by Vivek Yadav 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Adarsh Pal 5 years, 3 months ago

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(x+4) (x+10)

Posted by Déépanshú Víp 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Yatin Das 5 years, 3 months ago

By using formula (x+a) (x+b) = x^2+x(a+b)+ab (x+4)(x+10) x^2+x(4+10)+4×10 x^2+x(14)+40 x^2+14x+40 Dear friend, ^ means power (as used here). Hope it helps you

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Sum of 2 complementry angle is

Posted by Sanatan Mishra 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Rana Jii 5 years, 3 months ago

Gvc

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Manju Malhotra 5 years, 3 months ago

Is 90°

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P(x)=4-5

Posted by Sophiya Baby 5 years, 3 months ago

CBSE > Class 09 > Mathematics

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(2x+3)^3 -(2x+3)^3

Posted by Aayush Singh 5 years, 3 months ago

CBSE > Class 09 > Mathematics

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Yashasvijoshi Joshi 5 years, 3 months ago

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Find the volume of a sphere whose radius is 7cm and 0.63m

Posted by Suri Babu 5 years, 3 months ago

CBSE > Class 09 > Mathematics

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Abhishek Khora 5 years, 3 months ago

466

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Find the volme of a sphere whose radius is 7cm and 0.63cm.

Posted by Suri Babu 5 years, 3 months ago

CBSE > Class 09 > Mathematics

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If 3x+64=2rays to 6 +.(√3)rays to8

Posted by Anu Ade 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Anurag Kumar 5 years, 2 months ago

x=27

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Visualize 2.766 on the number line using successive magnification

Posted by Nikhil Dawas 5 years, 3 months ago

CBSE > Class 09 > Mathematics

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If x+y=8 and xy=15 , then x square + y square

Posted by Gaytri Verma 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Ritu Kumari 5 years, 3 months ago

x+y=8. (x+y)(x+y)=64 (x)(x)+(y)(y)+2xy = 64 (x)(x)+(y)(y)+ 2(15)=64 (x)(x)+(y)(y)+30 = 64 (x)(x)+(y)(y) = 34

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Prove that 1/1+√2+1/√2+√3+1/√3+√4+1/√4+√5+1/√5+√6+1/√6+√7+1/√7+√8+1/√8+√9 =2

Posted by Utkarsh Star 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Kunal Dutt Sharma 5 years, 3 months ago

Kya h ya

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If a square paper of side 25 cm is rolled to form a cylinder, then its curved surface area is

Posted by Aditya Srivastava 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Ritu Kumari 5 years, 3 months ago

CSA of cylinder = area of square = a * a. ( Here ' a ' is side ) = 25cm * 25cm = 625 square cm

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One of a diameter of a rhombus is 12 cm and its area is 54 square centimetre the find the perimeter of rhombus

Posted by Creative Spark 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Ritu Kumari 5 years, 3 months ago

Area of rhombus = 1/2( d1 * d2) 54 sq. cm. = 1/2( 12cm*d2 ) 54*2/12. = d2 d2 = 9cm Side = √(d1/2)(d1/2)+(d2/2)(d2/2) = √(6)(6)+(4.5)(4.5) = √36+20.25 = √56.25 = 7.5cm Perimeter = 4*side = 4*7.5cm = 30 cm

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A village r itwaari has a plot of land of the shape of a quadrilateral The grama panchayat of the village decided to take over some portion of his plot from one of the corners to construct a health center he agrees to the above proposal with the condition that he should be given equal amount of land in lieu of his land adjoining his plot so as to form a triangular plot .explain how this proposal will be implemented

Posted by Rajesh Reddy 5 years, 3 months ago

CBSE > Class 09 > Mathematics