A contractor undertook a contract to complete a part of a stadium in 9

1.	A contractor undertook a contract to complete a part of a stadium in 9 months with a team of 560 persons. Later on, it was required to complete the job in 5 months. How many extra persons should he employ to complete the work?
Answer» ∵ In 9 months, a part of stadium can complete by 560 persons. ∴ In 1 month, the work can be complete by 9 × 560 = 5040 persons. ∵ In 5 months, the work can be complete by 5040/5 = 1008 persons.

A contractor undertook a contract to complete a part of a stadium in 9 months with a team of 560 persons. Later on, it was required to complete the job in 5 months. How many extra persons should he employ to complete the work?

Answer»

∵ In 9 months, a part of stadium can complete by 560 persons.

∴ In 1 month, the work can be complete by 9 × 560 = 5040 persons.

∵ In 5 months, the work can be complete by 5040/5 = 1008 persons.