Question 66

35 girls can complete a piece of work in 12 days. If 5 fewer girls are put on the work, in how many days can they complete the work?

Solution

35 girls can complete a piece of work in 12 days. If 5 fewer girls are put on the work, then the time taken to complete the work is 'y' days.

$$girls_1\times\ days_1\ =\ girls_2\times\ days_2$$

$$35\times12\ =\left(35-5\right)\times\ y$$

$$35\times12\ =30\times\ y$$

$$7\times2\ =\ y$$

y = 14 days

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