A force of 25 N acts on a body at rest for 0.2s and a force of 70 N acts for the next 0.1s in opposite direction. If the final velocity of the body is `5ms^(-1)`, the mass of the body is

Options

A. 1 kg
B. 2 kg
C. 0.8 kg
D. 0.4 kg

Answer

D