Number Magic a textbook of Mathematics 8>Chapter 21 - Direct and Inverse Proportions>EXERCISE>Q 16

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8th CBSE

IMPORTANT

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At constant temperature the pressure of a gas is inversely proportional to its volume. If certain amount of a gas occupies a volume of $30 cc$ and exerts a pressure of $85 g / {cm}^{2}$ , then if the decrease in its pressure when the same amount of gas occupies a volume of $75 c c$ is $k g / {cm}^{2}$ , find $k$ .

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Important Questions on Direct and Inverse Proportions

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 21 - Direct and Inverse Proportions>EXERCISE>Q 17

If $x$ and $y$ vary inversely and $x = 4$ when $y = 9$ , find $x$ when $y = 6$ .

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 21 - Direct and Inverse Proportions>EXERCISE>Q 17

Find the missing variable.

If $x$ and $y$ vary inversely and $x = 32$ when $y = 15$ , find $y$ when $x = 60$ .

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 21 - Direct and Inverse Proportions>EXERCISE>Q 17

Find the missing variable.
If

x

and

y

vary inversely and

y = 12

, find

x

when constant of variation

= 210

.

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 21 - Direct and Inverse Proportions>EXERCISE>Q 17

Find the missing variable.
If

x

and

y

vary inversely and

x = 40

, find

y

when constant of variation

= 8

.