a man can row 30 km downstream and 20 km upstream in 4 hours. he can row 45 km

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Question

a man can row 30 km downstream and 20 km upstream in 4 hours. he can row 45 km downstream and 40 km upstream in 7 hours. find the speed of man in still water?

Options:

A . 15 kmph

B . 10 kmph

C . 12 kmph

D . 12.5 kmph

Answer: Option D
Explanation :

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Question 1. a person can row at 9 kmph and still water. he takes 4 1/2 hours to row from a to b and back. what is the distance bet....b if the speed of the stream is 1 kmph?

Question 2. a man can row a boat at 20 kmph in still water. if the speed of the stream is 6 kmph, what is the time taken to row a ....time taken to row a distance of 60 km downstream?

Question 3. the time taken by a man to row his boat upstream is twice the time taken by him to row the same distance downstream. i....water is 42 kmph, find the speed of the stream?

Question 4. a man can row downstream at 18 kmph and upstream at 10 kmph. find the speed of the man in still water and the speed of....man in still water and the speed of stream respectively?

Question 5. a man can row a boat at 20 kmph in still water. if the speed of the stream is 6 kmph, what is the time taken to row a ....time taken to row a distance of 60 km downstream?

Question 6. a man can row downstream at 18 kmph and upstream at 10 kmph. find the speed of the man in still water and the speed of....man in still water and the speed of stream respectively?

Question 7. a man can row downstream at the rate of 24 kmph and upstream at 7 kmph. find the man’s rate in still water and rate ....the man’s rate in still water and rate of current?

Question 8. a man rows to a place 48 km distance and back in 14 hours. he finds that he can row 4 km with the stream in the same t....km against the stream. the rate off the stream is?

Question 9. in a stream running at 2 kmph, a motor boat goes 10 km upstream and back again to the starting point in 55 minutes. fi....minutes. find the speed of motor boat in still water?

Question 10. the speed at which a man can row a boat in still water is 15 kmph. if he rows downstream, where the speed of current i....kmph, what time will he take to cover 60 metres?

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