12 men can complete a piece of work in 48 hours. In how many hours will 36 men complete the same piece of work ?
1). 18
2). 16
3). 32
4). 20
Using, $M_1 D_1 = M_2 D_2$
=> $12 \times 48 = 36 \times D_2$
=> $D_2 = \frac{48}{3} = 16$ hours
Using, $M_1 D_1 = M_2 D_2$
=> $12 \times 48 = 36 \times D_2$
=> $D_2 = \frac{48}{3} = 16$ hours
Using, $M_1 D_1 = M_2 D_2$
=> $12 \times 48 = 36 \times D_2$
=> $D_2 = \frac{48}{3} = 16$ hours