A motor-boat, travelling at the same speed, can cover 25 km upstream and 39 km downstream in 8 hours. At the same speed, it can travel 35 km upstream and 52 km downstream in 11 hours. The speed of the stream is

Challenger App

No.1 PSC Learning App

★

★

★

★

★

1M+ Downloads

A motor-boat, travelling at the same speed, can cover 25 km upstream and 39 km downstream in 8 hours. At the same speed, it can travel 35 km upstream and 52 km downstream in 11 hours. The speed of the stream is

A2 km/hr

B3 km/hr

C4 km/hr

D5 km/hr

Answer:

C. 4 km/hr

Read Explanation:

25 up+39 down = 8 hours. 35 up +52 down = 11 hours Solving 13 down-stream in 1 hours and 5 up-stream in 1 hour. Speed of stream 13-5/ 2 = 4km/hr

Related Questions:

The speeds of two boats A and B in still water are 25 km/hr and 30 km/hr respectively. The boats are 165 km apart. If both begins moving toward each other, A going downstream while B upstream, then in how many hours they will meet?

A swimmer can swim downstream at 13 km/h and upstream at 7 km/h. Find the speed of swimmer in still water.

നിശ്ചലമായ വെള്ളത്തിൽ മണിക്കൂറിൽ 20 km വേഗതയിൽ സഞ്ചരിക്കുന്ന മോട്ടോർ ബോട്ട് 30 km താഴേക്ക് പോയി മൊത്തം 4 മണിക്കൂറിനുള്ളിൽ തിരിച്ചെത്തുന്നു.സ്ട്രീമിന്റെ വേഗത?

In one hour, a boat goes 13 km/hr in the direction of the stream and 7 km/hr against the direction of the stream. What will be the speed of the boat in still water?

The speed of a boat in still water is 15 km/h, and the speed of the current is 5 km/h. In how much time (in hours) will the boat travel a distance of 60 km upstream and the same distance downstream?