A boat covers a certain distance downstream in 4 hours but takes 6 hours to return upstream to the starting point. If the speed of the stream be 3 km/hr, find the speed of the boat in still water
A man can row 40 kmph in still water and the river is running at 10 kmph. If the man takes 1 hr to row to a place and back, how far is the place?
At his usual rowing rate, Rahul can travel 12 miles downstream in a certain river in 6 hours less than it takes him to travel the same distance upstream. But if he could double his usual rowing rate for his 24-mile round trip, the downstream 12 miles would then take only one hour less than the upstream 12 miles. What is the speed of the current in miles per hour?
The speed of a boat in stll water is 10 km/hr. If its speed downstream be 13 km/hr, then speed of the stream is:
A boat goes 14 km upstream in 56 minutes. The speed of stream is 2 km/hr. The speed of boat in still water is
Two men A and B started walking towards each other’s starting point simultaneously from two points X and Y which are 12 km apart. They meet after 1 hr. After meeting A increased his speed by 6kmph. B reduced his speed by 6 kmph. They arrived at their destinations simultaneously. Find the initial speed of A?
A police man was travelling @ 90kmph. He crosses a thief travelling @ 60kmph in opposite direction. He had to travel for another 6 minutes before he would U turn and chase the thief? After they crossed each other how long in minutes police will catch the thief?
PQ is a tunnel. A dog sits at the distance of 5/ 11 of PQ from P. The train whistle coming from any end of the tunnel would make the dog run. If a train approaches P and dog runs towards P the train would hit the dog at P. If the dog runs towards Q instead, it would hit the dog at Q. Find ratio of speed of train and dog?
A father starts from home at 3 :00 p.m. to pick his son from school One day the school got over early, at 3:00 p.m. The son start walking home. He met his father on the way and both returned 15 minutes early then the usual time. If speed of father is 35kmph then find speed of son in kmph?
While travelling from office to home alok’s car gave him a trouble so he took 25% more time then his usual time to reach home. His speed in this case is what part of usual speed?
A has covered of total distance when his scooter failed. he parked it and cover the remaining distance by foot walking 22 times as much time as riding. how many times his riding speed more then his walking speed?
Bus B left town P for town Q at 6 a.m.@ 36kmph. While another bus C left town Q for town P at 7 : 30 a.m. @24kmph. At what would they be 12 km apart of distance between P and Q is 72km?
A train travelling at 72kmph starts overtaking a bike travelling at 36 kmph at 4 P.M and overtakes him in 20 sec. Then the train travels for 30 minutes and then start crossing another bike in opposite direction with speed of 36kmph. When will the second bike meet the first bike
The distance of my house to my friends house is 12 km. I walked at the speed of 4 kmph and after every km took rest of 10 minutes. How much time did it take for me to reach my friend’s house?
4 hr 50 min
I had to catch a bus which was 225 m ahead of me. The bus also started at the same time. If the speed of the bus was 2.5m/s and my speed was 36 kmph, In how much time can I catch the bus?
2 trains starting at the same time from 2 stations 200 km apart and going in opposite direction cross each other at a distance of 110 km from one of the stations. What is the ratio of their speeds?
Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour ?
Two boys starting from the same place walk at a rate of 5kmph and 5.5kmph respectively. What time will they take to be 8.5km apart, if they walk in the same direction?
A walks around a circular field at the rate of one round per hour while B runs around it at the rate of six rounds per hour. They start at same point at 7:30 am. They shall first cross each other at?
7: 42 am
A postman riding a bicycle at 15 km per hour reach a village in 4 hrs. If he is delayed by 1 hour at the start, then in order to reach his destination in time, he should ride with a speed of :