If 3 men with 4 boys can earn Rs. 2940 in 7 days and 5 men with 9 boys earn Rs. 4620 in 6 days. In how many days will 5 men with 3 boys earn Rs. 1180?

By chain rule, (3 M + 4 B)`xx` 7/2940 = (5 M + 9B )`xx` 6/4620 33M+44B=30M+54B 3M=10B M:B = 10:3 (3 M + 4 B)`xx` 7/2940 = (5 M + 3B )`xx` T/1180 (3 `xx` 10+ 4`xx` 3)`xx` 7/2940 = (5 `xx10` + 3`xx` 3)`xx` T/1180 (52)`xx` 7/2940 = (59)`xx` T/1180

So T = 2 days

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