16 men can paint 15 walls in 45 days. In how many days can 20 men paint 20 walls ?
Answer & explanation
Correct answer: option 3
Formula to used here,
\(\frac{M_1\;×\;D_1}{M_2\;×\;D_2}\) = \(\frac{W_1}{W_2}\)
where, M = No. of Men, D = No. of Days, W= Work,
⇒ Putting in the values,
⇒ \(\frac{16\;×\;45}{20\;×\;D_2}\) = \(\frac{15}{20}\)
⇒ \( { D}_{2 } \) = 48 days.