Instructions

For the following questions answer them individually

Question 21

A girl is observing a bird silting at a height of 500 in from the ground. The angle of elevation of the bird from the girl's eyes is 45Â° at the initial position. After some time, the girl moves on the ground towards the bird by 50 in and bird flies away from her At this point, the angle of elevation reduces to 30Â°. Find the distance travelled by the bird. Take $$\sqrt{3} = 1.73$$.Â

Question 22

Pipes A, B and C together can fill a tank in 4 hours. Pipes A and B together can fill the tank in 9 hours. If pipes A, B and C are opened simultaneously, and after 3 hours, pipes A and B are closed, then how many hours will C alone require to fill the tank?

Question 23

The sides of parallelogram are 12 m and 17 m respectively. If one of the diagonals is 25 m long, the area of parallelogram is:

Question 25

The Indian Government launched which scheme that aims to reduce expenditure by patients on treatment of cancer and cardiovascular diseases to make health care affordable for needy?