SOLUTION: if 70 mens completed a road in 35 days then in how many days 40 mens completed the same road

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Question 877052: if 70 mens completed a road in 35 days then in how many days 40 mens completed the same road
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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If 70 men completed a road in 35 days, then how many days for 40 men to complete the same road?
:
Find how many man-days to complete the road: 70*35 = 2450 man-days
:
Let d = days required for 40 men to do it.
40d = 2450
d = 2450/40
d = 611%2F4 days