If wavelength of a sound wave in a medium is reduced by 50% , then the percentage change in its frequency is

If the momentum of a body is increased by 50%, then the percentage increase in its kinetic energy is

If the radius of a circle is decreased by 50%, find the percentage decrease in its area.

If the wavelength of a sound source is reduced by a factor of 2, what happens to the waves frequency? What happens to its speed?

If the current flowing through a coil is reduced by 50% then the energy in the coil

If the length of a rectangular field is doubled and its breadth is halved (i.e, reduced by 50% ) . What is percentage change in its area ?

If the length of a rectangular field is doubled and its breadth is halved (i.e, reduced by 50% ) . What is percentage change in its area ?

If the radius of cylinder is doubled, but height is reduced by 50% . What is the percentage change in volume ?

If the radius of cylinder is doubled, but height is reduced by 50% . What is the percentage change in volume ?