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It is a example of inverse proportion Let us consider 3 persons can work in y hours 1 person - 5 hours 3 persons - y hours 1×5 = 3×y y = 5/3 5/3 of an hour = 5/3 ×60 = 120 minutes = 1 hr 20 min

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(2a+3b)(a-b)=a2-8

Posted by anku****@***** 6 years, 2 months ago

CBSE > Class 08 > Mathematics

1 answers

Sujeet Munda 6 years, 2 months ago

Yoxyyky

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ANSWER

9x(6x-5y) -12x²

Posted by Rinku Choudhary 6 years, 2 months ago

CBSE > Class 08 > Mathematics

3 answers

Mantesh Mathapatti 6 years, 2 months ago

This is right 3x(6x-5y) (3-4x)

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Mantesh Mathapatti 6 years, 2 months ago

Sorry thar was not right

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Mantesh Mathapatti 6 years, 2 months ago

X(42x-45y)

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66pq

Posted by Faisalkhan Khanfaisal 6 years, 2 months ago

CBSE > Class 08 > Mathematics

0 answers

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41+89-(-+81)×810098765879

Posted by Vansh Nagar 6 years, 2 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

3x+4x+6y

Posted by Neeraj Sulam 6 years, 2 months ago

CBSE > Class 08 > Mathematics

5 answers

Bharti Goyal 6 years, 2 months ago

3x+4x+6y =(3+4)x+6y 7x+6y

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Sujeet Munda 6 years, 2 months ago

7x +6y

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Vansh Nagar 6 years, 2 months ago

7x+6y

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Yogita Ingle 6 years, 2 months ago

3x + 4x + 6y

=(3+4)x + 6y

= 7x + 6y

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Neeraj Sulam 6 years, 2 months ago

13xy

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A person plant to save rain water on his roof rainfall on a particular day in 10 cm and the roof is 70 metre long and 44 m wide he collects the same water in a cylindrical tank of radius 14 find the rise in water level of cylindrical tank which value is depicted in this question

Posted by Juaana Vohra 6 years, 2 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

There are 20 balls in a bag out of them are8 red 10 are black and remaining are Blue Balls one ball is drawn randomly find the probability that the draw ball is blue ball

Posted by Juaana Vohra 6 years, 2 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

A loaded truck Travels 14 km in 25 minutes if the speed remain the same how far can it travel in 5 hours

Posted by Juaana Vohra 6 years, 2 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Find area of square which has perimeter 16 centimetre

Posted by Juaana Vohra 6 years, 2 months ago

CBSE > Class 08 > Mathematics

1 answers

Asmi Bansal 6 years, 1 month ago

Perimeter of square is 4 *side so accoeding to this the answer will be 64 cm

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Product of (2 - X) and (- X + 2) is

Posted by Juaana Vohra 6 years, 2 months ago

CBSE > Class 08 > Mathematics

2 answers

Yogita Ingle 6 years, 2 months ago

(2 - X) (- X + 2)
= 2(-x + 2) -x(-x+ 2)

= -2x + 4 + x² -2x
= x² - 4x + 4

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Sahil Nikalje 6 years, 2 months ago

(-2X) (-2X)

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Find a common divisibility rule for all numbers

Posted by Satyam Dhirte 6 years, 2 months ago

CBSE > Class 08 > Mathematics

1 answers

Yogita Ingle 6 years, 2 months ago

The Rule for 2 : Any whole number that ends in 0, 2, 4, 6, or 8 will be divisible by 2.
The Rule for 4 : If the last two digits of a whole number are divisible by 4, then the entire number is divisible by 4.
he Rule for 8: If the last three digits of a whole number are divisible by 8, then the entire number is divisible by 8.
The Rule for 5: Number that are divisible by 5 must end in 5 or 0.
The Rule for 10: Numbers that are divisible by 10 need to be even and divisible by 5, because the prime factors of 10 are 5 and 2. Basically, this means that for a number to be divisible by 10, the last digit must be a 0.

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Basic maths

Posted by Prince Kumar 6 years, 2 months ago

CBSE > Class 08 > Mathematics