Question
Boat ‘A’ can cover 100 km in still water in 10
hours. In still water, if the ratio of the speed of boat ‘A’ to that of ‘B’ is 2:3 and the speed of stream is 3 km/hr then find the time taken by boat ‘B’ to cover the 378 km in downstream.Solution
Speed of boat ‘A’ in still water = 100/10 = 10 km/hr Speed of boat ‘B’ in still water = 10 × (3/2) = 15 km/hr Downstream speed of boat ‘B’ = 15 + 3 = 18 km/hr Time taken by boat ‘B’ to cover 378 km in downstream = 378/18 = 21 hours
Two boats A and B start towards each other from two places, 312 km apart. Speed of the boat A and B in still water are 14 km/h and 10 km/h respectively....
What is the difference between the mode and the meaning of the observations?
2,3,4, 5, 6, 7, 8, 12, 9, 12, 5, 12
A boat takes 7 hours to cover 245 km upstream and 9 hours to cover 477 km downstream. Find the time taken by the boat to cover 410 km upstream and 495 k...
- A launch covers 225 km in downstream in 5 hours. If the upstream speed is one-third of the downstream speed, find the time needed to travel 150 km upstream...
Speed of a boat in still water is 3 times more than the speed of stream. If boat covers 135 km in downstream in 9 hours, then find the time taken by the...
Speed of a boat in still water is 6 times more than the speed of stream. If boat covers 112 km in downstream in 8 hours, then find the time taken by the...
A boat takes 6 hours to travel 48 km upstream and 3 hours to travel 60 km downstream. What is the speed of the boat in still water?
A man can go on a motor boat with a speed of 15 km/hour in still water to a certain upstream point and come back to the starting point in a river which ...
A motorboat covers 48 km downstream and 30 km upstream in 6 hours. Under the same conditions, it covers 64 km downstream and 20 km upstream also in 6 ho...
The time taken by a boat to travel (5p + 60) km upstream is equal to the time taken to travel (8p - 40) km downstream. Given that...
Relevant for Exams:
