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?

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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?

A20

B12

D10

Answer:

C. 9

Read Explanation:

Speed of boat in upstream = 15 – 5 = 10 km/h Speed of boat in downstream = 15 + 5 = 20 km/h Time taken by boat to travel 60 km upstream = 60/10 = 6 hours Time taken by boat to travel 60 km downstream = 60/20 = 3 hours Time taken by boat to travel a distance of 60 km upstream and the same distance downstream = 6 + 3 = 9 hours

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ഒരു ബോട്ട് Aയിൽ നിന്ന് Bയിലേക്കും തിരിച്ചും 4 മണിക്കൂർ കൊണ്ട് എത്തുന്നു. നിശ്ചലജലത്തിൽ ബോട്ടിന്റെ വേഗം 8 km/hr. ഒഴുക്കിന്റെ വേഗം 2 km/hr ആണെങ്കിൽ Aയിൽ നിന്ന് Bയിലേക്കുള്ള ദൂരം എത്ര?

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?