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## Question

secondary 3 | E Maths

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Stuck

= 8640

So it takes 8640 man-hours to construct the house.

For 18 men working 7.5 hours a day,

Number of man-hours worked in 1 day

= 18 x 7.5

= 135 hours

Number of days taken to build the house

= 8640 ÷ 135

= 64

So 64 - 54 = 10

So it takes 10 more days

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