14 men can complete a work in 15 days. If 21 men are employed, then in how many days will they complete the same work?
Answer & explanation
Correct answer: option 1
Using formula,
\( { M}_{1 } \) x \( { D}_{1 } \) = \( { M}_{2 } \) x \( { D}_{2} \)
where, M = no. of men, D = no. of days
⇒ 14 x 15 = 21 x \( { D}_{2} \) ⇒ \( { D}_{2} \) = 10 days.
Therefore 21 men will complete the work in 10 days.