72 men do a piece of work in 25 days. In how many days will 30 men do the same work?
Answers:
Men : Days :: men : Days
72 : 25 :: 30 : x
∴ By inverse proportion
72 × 25 = 30 × x
⇒ x = (25 × 72)/30
= 60 days
72 men do a piece of work in 25 days. In how many days will 30 men do the same work?
Men : Days :: men : Days
72 : 25 :: 30 : x
∴ By inverse proportion
72 × 25 = 30 × x
⇒ x = (25 × 72)/30
= 60 days