24 persons can do a piece of work in 20 days. In how many days can 30 persons do the same work?
Answer & explanation
Correct answer: option 1
Formula to be used,
\( { M}_{1 } \) x \( { D}_{1 } \) = \( { M}_{2 } \) x \( { D}_{2 } \)
where, M = No. of Men, D = No. of Days,
⇒ Putting values in the formula,
⇒ 24 x 20 = 30 x \( { D}_{2 } \)
⇒ \( { D}_{2 } \) = 16 days.