A man descends into an underground floor at the rate of 6 metres per minute. If the descent start from 10 metres above the ground level, how much time will it take to descend 230 metres below the ground?

A man descends into an underground floor at the rate of 6 metres per m

1.	A man descends into an underground floor at the rate of 6 metres per minute. If the descent start from 10 metres above the ground level, how much time will it take to descend 230 metres below the ground?
A.	30 minutes
B.	50 minutes
C.	40 minutes
D.	1 hour 30 minutes
Answer» D. 1 hour 30 minutes

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A man descends into an underground floor at the rate of 6 metres per minute. If the descent start from 10 metres above the ground level, how much time will it take to descend 230 metres below the ground?

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