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If 20 men can build a wall 66 metres long in 6 days, what length of a similar can be built by 86 men in 8 days? |
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Answer» Let the required length be x metres More men, More length built (Direct Proportion) Less days, Less length built (Direct Proportion) Men 20: 35 Days 6: 3 : : 56 : x Therefore (20 x 6 x x)=(35 x 3 x 56) x=(35 x 3 x 56)/120=49 Hence, the required length is 49 m. |
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