Q36Multiple choice
A ladder, 5 meter long, standing on a horizontal floor, leans against a vertical wall. If the top of the ladder slides downwards at the rate of 10 cm/sec, then the rate at which the angle between the floor and the ladder is decreasing when lower end of ladder is 2 metres from the wall is: 1 1
- (A)radian/sec
- (B)radian/sec
- (C)20 radian/sec 10 20
- (D)10 radian/sec