engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test Mathematics Differential Calculus Applications of Derivatives
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
\(\frac{1}{10}\) radian/sec
2
\(\frac{1}{20}\) radian/sec
3
20 radian/sec
4
10 radian/sec