If 5 men can paint a wall 100 metres long in 10 days of a 8 hours each. In how many days of 6 hours each will 8men paint a wall 30 metres long?
5
2.5
1.5
10
A
10
B
2.5
C
5
D
1.5
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Solution
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Total hours in 10 days =10×8=80 hours Total man-hours needed for paint 100 m wall =5×8=40 man-hours. Man-hours needed for 1 meter wall painting=400/100=4 man-hour. Now, 30×4=120 m-h to do 30 meters. 120 m-h/8 men =15 hours 15 hr/6 hr/day =2.5 days.
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