Recent questions tagged times and speed

+2 votes

1 answer

A sailor goes 8 km downstream in 420 minutes and returns in 1 hour. Find the speed of the sailor in still water and the speed of the current .

asked Apr 6, 2019 in Class 10 by kratos

+3 votes

1 answer

Speed of a boat in still water is 15 km/hour. It goes 30 km up stream and returns back at the same point in 4 hours 30 minutes.

asked Apr 2, 2019 in Class 10 by kratos

+1 vote

1 answer

A man rows to a place 48 km distinct and come back in 14 hrs. He finds that he can row 4 km with the stream

asked Mar 28, 2019 by kratos

+1 vote

1 answer

The distance between two stations is 340 km. Two trains start simultaneously from these stations on parallel tracks to cross each other.

asked Dec 15, 2018 in JEE by kratos

+2 votes

1 answer

Write true or false for each statement (a) Two trains going in opposite directions with the same speed are at rest relative to each other.

asked Oct 2, 2018 in JEE by kratos

+3 votes

1 answer

The coefficient of x^160 in the expansion of (x^8 + 1)^60(x^12 + 3x^4 + 3/x^4 + 1/x^12)^-10 is

asked Sep 9, 2018 in JEE by kratos

+2 votes

1 answer

The speed of a motor boat in still water is 20 km/hr and river flow is 5 km/hr. A float is droped from the boat

asked Sep 8, 2018 in Class 12 by kratos

+3 votes

1 answer

A motorboat whose speed is 9 km/hr in still water, goes 15 km downstream and comes back in a total time of 3 hours 45 minutes.

asked May 14, 2018 in Class 10 by kratos

+3 votes

1 answer

A careless boy goes to his school with the speed of 4 km/hr. He finds that his school is closed so he comes back to his

asked Apr 3, 2018 in Class 11 by kratos

+3 votes

1 answer

A man standing on a railway platform noticed that a train took 21 seconds to cross the platform

asked Mar 23, 2018 in Class 11 by kratos

+1 vote

1 answer

A steam boat goes across a lake and comes back (i) on a quiet day when the water is still, and (ii) on a rough day when there is a uniform current

asked Mar 22, 2018 in JEE by kratos

+1 vote

1 answer

A boat is moving in a river, down stream, whose stream has speed 8km/ hr. the speed of the motor of the boat is 22km/hr.

asked Mar 18, 2018 in JEE by kratos

+2 votes

1 answer

Wind is blowing west to east along two parallel tracks. Two trains moving with same speed in opposite directions have the relative velocity w.r.t.

asked Feb 27, 2018 in JEE by kratos

+3 votes

1 answer

A man of mass 60 kg standing on a platform executing *.H.M. in the vertical plane.

asked Jan 19, 2018 in Class 12 by kratos

+2 votes

1 answer

A body moves from A to B and come back to A and then goes to C point. Find distance and displacement of the body.

asked Jan 12, 2018 in JEE by kratos

To see more, click for the full list of questions or popular tags.

...