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Practice Boats and Streams – A motorboat whose speed is 15 kmph in still water goes 30 kmph downstream and comes back in a total of 4hrs 30min the speed of the stream in kmph is (5kmph).
Practice Boats and Streams – Given that 1
Practice Boats and Streams – A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?
Practice Boats and Streams – A boat moves down stream at the rate of 1 km in 6 minutes and upstream at the rate of 1 km in 10 minutes. The speed of current is?
Practice Boats and Streams – A boat goes 24 km upstream and 28 km downstream in 6 hours. It goes 30 km upstream and 21 km downstream in 6 hours and 30 minutes. The speed of the stream is
Practice Boats and Streams – In 1 hour, a boat goes 9 km along the stream and 3 km against the stream. The speed of the boat in still water (in km/hr) is :
Practice Boats and Streams – A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:
Practice Boats and Streams – A motor boat goes 10 km up streams and back again to the starting point in 55 min. The current of a stream runs at the rate of 2 km per hr.
Find the speed of the motor boat in still water ?
Practice Boats and Streams – A man rows at 10 kmph in still water. He goes to a place 96 km. away and come back taking 20 hours totally. What is the speed of current ?
Practice Boats and Streams – A man can row with the stream at 7 km/hr and against the stream at 3 km/hr. His speed in still water is:
Practice Boats and Streams – A man can row at 10 km/hr in still water. If the velocity of current is 2 km/hr and it takes him 10 hours to row to a place and come back, how far is the place ?
Practice Boats and Streams – A boatman can row 2 km against the stream in 20 minutes and return in 18 minutes. Find the rate of current
Practice Average – Consider three classes A, B and C with 20, 30 and 50 students respectively. The averages score in maths of students in class B is 16 more than that of those in class C and the average score of those in class A is 2 more than the overall average of scores in A, B and C. What is the difference between average of class C and class A?
Practice Average – Some students are standing in a circle in which 6th and the 16th student are standing opposite to each other. find how many students were present there.
Practice Average – Average age of a group of 39 students was found to be 13.5 years. But later it was found that 2 students whose ages taken for the average as 12 years and 13 years were actually 10 years and 14 years. How much the actual average should change from 13.5 years?