26.
A contract is to be completsd in 46 days
sad 117 men were said to work 8 hours a day. After 33 days, (4/7) of the work
is completed. How many additional men may be employed so that the work may be
completed in time, each man now working 9 hours a day?
Answer:
Remaining work = (1-(4/7) =(3/7)
Remaining
period = (46 - 33) days = 13days
Let
the total men working at it be x.
Less
work, Less men (Direct Proportion)
Less
days, More men (Indirect Proportion)
More
Hours per Day, Less men (Indirect Proportion)
Work
(4/7): (3/7)
Days
13:33 } : : 117: x
Hrs/day
9 : 8
Therefore
(4/7) x 13 x 9 x x =(3/7) x 33 x 8 x 117 or x=(3 x 33 x 8 x 117)/(4 x 13 x
9)=198
Additional
men to be employed = (198 - 117) = 81.
