Monica Capoor Solutions for Chapter: Direct and Inverse Proportions, Exercise 4: EXERCISE

Vikas has enough money to buy $90$ pumps worth $₹500$ each. How many more pumps can he buy, if he gets a discount of $₹50$ on each pump?

If oranges are sold at $₹45$ per dozen, Manu can buy $6$ dozens of them with the money he has. Find the decrease in the number of oranges that he can buy if the cost is increased by $₹9$ per dozen

If $9$ taps of the same size empty a tank in $36$ minutes, how long will it take to empty the tank if $5$ taps go out of order?

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

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

Find the missing variable.

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

Find the missing variable.
If $x$ and $y$ vary inversely and $y=12$, find $x$ when constant of variation $=210$.

Find the missing variable.
If $x$ and $y$ vary inversely and $x=40$, find $y$ when constant of variation $=8$.