Question
30 workers are laying a 6 km railway track. After 18
days, they finish 3/5 of the total work. To speed it up, 10 more workers are added. How many days will it take to lay the remaining track?Solution
ATQ, Let the number of days to complete the remaining work be x. (30 × 18) / (3/5 × 6) = 40x / (2/5 × 6) (30 × 18) / (18/5) = 40x / (12/5) 150 = 40x / (12/5) 150 = (40x × 5) / 12 150 = (200x) / 12 150 × 12 = 200x 1800 = 200x x = 9 days
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