If price of tea is increased by 20% , by what percent must the consumption be reduced to keep the expense the same ?

If diameter of a sphere is decreased by 25% then what percent does its curved surface area decrease ?

If momentum is increased by 20% ,then K.E.increases by :

Price of petrol increased by 10% last year. Now the prices are reduced by 10% Find the net increase or decrease in the price of petrol.

A wire of strethed by 20% . What is percentage change in its resistance?

A speaks truth in 75% of the cases. While B in 90% of the cases. In what percent of cases are they likely to contradict each other in stating in the same fact? Do you think that statement of B is true?

Pressure of an ideal gas is increased by keeping temperature constant. What is the effect on kinetic energy of molecules?

A speaks truth in 75% and B in 80% of the cases. In what percentage of cases are they likely to contradict each other in narrating the same incident?

If the height of a cylinder is doubled, by what number must the radius of the base be multiplied so that the resulting cylinder has the same volume as the orginial cylinder