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Question
A labourer earns Rs 1980 in 12 days.
(i) How much does he earn in 7 days?
(ii) In how many days will he earn Rs 2640?
Solution
(i) Earning of a labourer in 12 days = Rs 1980
Earning of the labourer in 1 day = `1980/12` = Rs 165
Earning of the labourer in 7 days = 7 × 165 = Rs 1155
(ii) Number of days taken by the labourer to earn Rs 1980 = 12 days
Number of days taken by him to earn Re 1 = `12/1980` days
Number of days taken by him to earn Rs 2640 = 2640 × `12/1980=31680/1980` = 16 days
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