48 Persons can complete a part of work in 35 hours. In how may hours will 20 persons do it ?
Answer & explanation
Correct answer: option 4
Total work = No. of person × Time = 48 × 35
and
Let 20 person can do the same work in T hours.
Therefore,
Total work = No. of person × Time
48 × 35 = 20 × T
T = \(\frac{48 × 35}{20}\) = 12 × 7 = 84 hrs.