A body of mass 6 kg accelerates from 6 m/s to 18 m/s in 3 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).
A man standing on the bank of river observes that the angle subtended by a tree on the opposite bank is 60°. When he retires 36 m from the bank, he finds that the angle is 30°. The breadth of the river is
In the following figure, rectangle represents Psychologists, circle represents Curators, triangle represents Comedians and square represents Indians. Which set of letters represents Indians who are both Curators as well as Psychologists?