The distance between A and B is 999 km. An express train leaves place A at 6am and runs at a speed of 55.5 km/hr. The train stops on the way for 1 hour 20 minutes. It reaches B at

• 1.20 am

• 12 pm

• 6 pm

• 6 pm

A certain distance is covered by a cyclist at a certain speed. If a jogger covers half the distance in double the time, the ratio of the speed of the jogger to that of the cyclist is

• 1 : 4

• 4 : 1

• 1 : 2

• 1 : 2

If a boy walks from his house to school at the rate of 4 km per hour, he reaches the school 10 minutes earlier than the scheduled time. However, if he walks at the rate of 3 km per hour, he reaches 10 minutes late. Find the distance of his school from his house.

• 5 km

• 4 km

• 6 km

• 6 km

A car covers  of the distance from A to B at the speed of 8km/hr,  of the distance at 25 km per hour and the remaining at the speed of 20 km per hour. Find the average speed of the whole journey.

• 12.625 km/hr

• 13.625 km/hr

• 14.625 km/hr

• 14.625 km/hr

Walking at 3 km per hour, Pintu reaches his school 5 minutes late. If he walks at 4 km per hour he will be 5 minutes early. The distance of Pintu's school from his house is

• 

• 2 km

• 
• 

A man driving at  of his original speed reaches his destination 20 minutes later than the usual time. Then the usual time is

• 45 minutes

• 60 minutes

• 75 minutes

• 75 minutes

A motor boat, travelling at the same speed, can cover 25 km upstream and 39 km downstream in 8 hours. At the same speed, it can travel 35 km upstream and 52 km downstream in 11 hours. The speed of the stream is

• 2 km/hr

• 3 km/hr

• 4 km/hr

• 4 km/hr

38.

A motor-boat can travel at 10 km/hour in still water. It travelled 91 km downstream in a river and then returned to the same place, taking altogether 20 hours. Find the rate of flow of river.

• 3 km/hour

• 4 km/hour

• 2 km/hour

• 2 km/hour

If A travels to his school from his house at the speed of 3 km/hr, then he reaches the school 5 minutes late. If he travels at the speed of 4 km/hr, he reaches the school 5 minutes earlier than school time. The distance of his school from his house is

• 1 km

• 2 km

• 3 km

• 3 km

Two places A and B are 100 km apart on a highway. One car starts from A and another from B at the same time. If the cars travel in the same direction at a constant speed, they meet in 5 hours. If the cars travel towards each other, they meet in 1 hour. What is the speed of the car running faster?

• 60 km/hr

• 50 km/hr

• 40 km/hr

• 40 km/hr