<PRE><B>Question 1146122</B>
A block industry estimates that 10 men must work for 8 hours each day to complete a job in 30 days.
 If only 8 men are to complete the job in 40 days, how long must they work each day?
:
Find the number of man-hours required to do the job
10 * 8 * 30 = 2400 man-hours
:
let h = no. of hrs worked each day
8 * 40 * h = 2400
320h = 2400
h = 2400/320
h = 7.5 hrs a day
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