Question

The ratio of the speed of boats ‘A’ and ‘B’ in

Q: Answer-The ratio of the speed of boats ‘A’ and ‘B’ in still water is 8:9, respectively. The speed of the cu...

Let the speeds of boats A and B in still water be 8x kmhr and 9x kmhr Therefore, speed of the current 0.25 8x 2x kmhr According to the question, 8x 2x 6408 Or, 10x 80 Or, x 8 Therefore, upstream speed of boat B 9x 2x 7x 56 kmhr Downstream speed of boat B 9x 2x 11x 88 kmhr Required time taken 16856 88088 3 10 13 hours

still water is 8:9, respectively. The speed of the current is 25% of the speed of boat ‘A’ in still water. If boat ‘A’ takes 8 hours to travel 640 km downstream, then find the time taken by boat ‘B’ to travel 168 km upstream and 880 km downstream. (Note: Both the boats are rowing in the same stream.)

A 10 hours

B 14 hours

C 12 hours

D 13 hours

E None of these

Practice Next