A. 3.6 sec

B. 18 sec

C. 36 sec

D. 72 sec

Speed of train relative to jogger = (45 - 9) km/hr = 36 km/hr.

= 10 m/sec.

Distance to be covered = (240 + 120) m = 360 m.

3 pipes can fill a reservoirin 10,15 and 20 hrs. resp. The first was opened at 5 a.m. , the second at 6 a.m., third at 7 a.m. When will the reservoir the filled?

Three runners A, B and C run a race, with runner A finishing 12 meters ahead of runner B and 18 meters ahead of runner C, while runner B finishes 8 meters ahead of runner C. Each runner travels the entire distance at a constant speed. What was the length of the race?

3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

In a game of 100 points, A can give B 20 points and C 28 points. Then, B a start of 8 m and still beats him by 8 sec. The speed of B is

A train runs at the speed of 72 kmph and crosses a 250 m long platform in 26 seconds. What is the length of the train?