A ball is dropped from a height of 10 m. It strikes the ground and rebounds up to a height of 2. m. During the collision, the per cent loss in the kinetic energy is
In how many test matches did Ravichandran Ashwin achieve the feat of becoming the fastest player in the world (in terms of number of matches) to get 300 wickets in test cricket in November 2017?
A and B together can finish a work in 30 days. They worked for it for 20 days and then B left the work. The remaining work was done by A alone in 20 days more. In how many days can A alone finish the work?