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Solve the following mathematical problems:
50 daily workers can complete a culvert in 40 days. If 30 of them work daily and the rest work in every alternative day, how many more days will be required to complete the project?
Daily workers complete in 40 days 30 x 40 =1,200
∴Alternative workers complete in 40 days = 20 ×402=400
Now assume, they work x days after 40 days.
That means, alternate workers will work for x2 days.
∴Total task can be written as
= 1, 200 + 400 + 30x + 20 ×x2 = 2000
= 1, 600 + 30x + 10x = 2
=40x = 400
∴x=40040=10 days.
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