A can do a piece of work in 20 days and B can do it in 30 days. How long will they take to do the work together?
The correct answer is B
An Aeroplane flies along a Square field @ 50, 100, 200 and 400 km/hours respectively. Then find the Average speed of the aeroplane during the whole jour...
A policeman saw a thief from a distance of 450 m. When the policeman started chasing him, the thief also started running. The ratio of speeds of the th...
Tarun takes 1hr 30 min in walking to a certain place and riding back. He would have gained 40 min by riding both ways. How long would he take to walk bo...
Train ‘A’ running at a speed of 19.8 km/hr. can cross a standing goods train 4 times its length in 40 seconds. Find the time taken by 300 meters lon...
A is cycling at an average speed of 10 km/hr such that he can reach a certain point at 12 noon. If he cycles at 15 km/hr, then he will reach the destina...
Two cars A and B travel from one city to another, at speeds of 72 km/hr and 90 km/hr respectively. If car B takes 1 hour lesser than car A for the jour...
The speed of two cars A and B are in the ratio of 14:17 respectively. Car A travels 12 km less than the car B in the same time duration. What was the di...
If a person walks 20% more than of his usual speed, reaches his distance 90 minutes before. If the destination is 459 km away, then the usual speed of a...
A boy goes to school at 11 km/Hr and return at a speed of 10 km/hr. If he takes 21 hrs in all. Find the distance from his village to school.
In a 1200 m race, bike A beats bike B by 100 m. bike B beats bike C by 100 m in a 600 m race. If bike A beats bike C by 30 sec in a 720 m race, then wha...
