1. 8 workers can build a wall 18 m long, 2 m broad and 12 m high in 10 days, working 9 hours a day. Find how many workers will be able to build a wall 32 m long, 3 m broad and 9 m high in 8 days working 6 hours a day ?
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By: anil on 05 May 2019 01.51 am
Using, $$frac{M_1 * D_1 * H_1}{W_1} = frac{M_2 * D_2 * H_2}{W_2}$$ where, M -> number of men , D -> no of days , H -> No of hours and W -> amount of work done So, putting values in equation, we get : $$M_1$$ = 8 , $$M_2$$ = $$x$$ = ? $$D_1$$ = 10 , $$D_2$$ =8 $$H_1$$ = 9 , $$H_2$$ = 6
$$W_1$$ = 18*2*12 = 432 , $$W_2$$ = 32*3*9 = 864
Now, $$frac{8*10*9}{432} = frac{x*8*6}{864}$$ => $$x = frac{8*10*9*864}{432*8*6}$$ = 30
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$$W_1$$ = 18*2*12 = 432 , $$W_2$$ = 32*3*9 = 864
Now, $$frac{8*10*9}{432} = frac{x*8*6}{864}$$ => $$x = frac{8*10*9*864}{432*8*6}$$ = 30