Question
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?Solution
By chain rule, (3 M + 4 B) × 7/2940 = (5 M + 9B ) × 6/4620 33M+44B=30M+54B 3M=10B M:B = 10:3 (3 M + 4 B) × 7/2940 = (5 M + 3B ) × T/1180 (3 x 10+ 4 × 3) ×7/2940 = (5 × 10 + 3 × 3) × T/1180 (52) × 7/2940 = (59) × T/1180 So T = 2 days
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