Challenger App

No.1 PSC Learning App

1M+ Downloads
A person can swim in water with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, what will be the time taken by the person to go 68 km downstream?

A2.5 hours

B3 hours

C4 hours

D3.5 hours

Answer:

C. 4 hours

Read Explanation:

Downstream Speed = (13+4) km/hr = 17 km/hr To travel 68 km downstream. Time taken = 68/17 = 4 hours


Related Questions:

A man can row 6 km/hr. in still water. It takes him twice as long to row up as to row down the river. Find the rate of stream
നിശ്ചലമായ വെള്ളത്തിൽ മണിക്കൂറിൽ 20 km വേഗതയിൽ സഞ്ചരിക്കുന്ന മോട്ടോർ ബോട്ട് 30 km താഴേക്ക് പോയി മൊത്തം 4 മണിക്കൂറിനുള്ളിൽ തിരിച്ചെത്തുന്നു.സ്ട്രീമിന്റെ വേഗത?
Speed of a speed-boat when moving in the direction parallel to the direction of the current is 16 km/hr. Speed of the current is 3 km/hr. So the speed of the boat against the current will be (in km/hr)
A man can row 40 kmph in still water and the river is running at 10 kmph. If the man takes 2 hr to row to a place and back, how far is the place?
A man rows a boat 18 kilometres in 4 hours down-stream and returns upstream in 12 hours. The speed of the stream (in km per hour) is :