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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More Questions on This Topic :

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. 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 3. 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 hour....7 hours. find the speed of man in still water?

Question 4. 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 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. 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 7. 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 8. 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 9. 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 10. 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?

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