If 540 kg of grass would feed 100 cows for 9 days, then how many days would 900 kg of grass feed 50 days?
Answer & explanation
Correct answer: option 4
Formula used:
$\frac{M_1 \times D_1}{W_1}$ = $\frac{M_2 \times D_2}{W_2}$
Here, $M_1 = 100 cows, D_1 = 9 days, W_1 = 540 kg$,
$M_2 = 50 cows, D_2 = ?, W_2 = 900 kg$
⇒ $\frac{100 \times 9}{540}$ = $\frac{50 \times D_2}{900}$
⇒ $D_2$ = 30 days