Question
A 6 km long boundary wall is to be built by 32 workers.
After 15 days, only 3/4 of the wall is completed. Then 8 more workers join them. In how many days will the remaining part be completed?Solution
ATQ, Let the number of days to complete the remaining work be x. (32 × 15) / (3/4 × 6) = 40x / (1/4 × 6) (32 × 15) / (9/2) = 40x / (3/2) (480 × 2) / 9 = (40x × 2) / 3 160/3 = 80x/3 160 = 80x x = 4 days
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