If earths rotational motion increases by 12% then the relation between a day and hours will be `12\ hou r s=1\ d a y` b. `20 5/7\ hou r s=1\ d a y` c. `21 3/7hou r s=1\ d a y` d. None of these

A car covers a distanced of 432 km at the speed of 48 km/hr. In how many hours will the car cover this distance? 6 hou r s b. 7 hou r s c. 9 hou r s d. 12 hou r s e. none of these

A vessel has three pipes connected to it two to supply liquid and one to draw liquid. The test alone can fill the vessel in 4 1/2 hours, the second in 3 hours and the third can empty it in 1 1/2 hours. It all the pipes are opened simultaneously when the vessel is hall full, how soon will it be emptied? 4 1/2hou r s b. 5 1/2 hou r s c. 6 1/2 hou r s d. none of these

A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank? 20 hou r s b. 25 hou r s c. 35 hou r s d. cannot be determined e. none of these

An outlet pipe can empty a cistern in 3 hours. In what time will the empty 2/3 part of the cistern? 3 hou r s b. 5 hou r s c. 2 hou r s d. 4 hou r s

Reena, Aastha and Shloka can independently complete a piece of work in 6 hours, 4 hours and 12 hours respectively. If they work together, how much time will they take to complete that piece of work? 2 hou r s b. 5 hou r s c. 6 hou r s d. hou r s e. none of these

In covering a certain distance, the speeds of A and B are in the ratio of 3:4. A takes 30 minutes more than B to reach the destination. The time taken by A to reach the destination is 1 hou r b. 2 hou r s c. 1 1/2hou r s d. 2 1/2hou r s

Car is driven at the speed of 100 km/hr and stops for 10 minutes t the end of every 150 km. to cover a distance of 1000 km, it will take 9 hou r s b. 10 hou r s c. 11 hou r s d. 12 hou r s

5 persons can prepare an admission list in 8 days working 7 hours a day. If 2 persons join them so as to complete the work in 4 days, they need to work per day for 8 hou r s b. 9 hou r s c. 10 hou r s d. 12 hou r s

In a flight of 6000 km, an aircraft was slowed down due to bad weather. The average speed for the trip was reduced by 400 kmph and the time of flight increased by 30 minutes. The original planned duration of the fight was 2 1/2hou r s b. 3 1/3hou r s c. 4 1/3hou r s d. 5 1/3hou r s