10 people can dig a trench in 6 days. How many people can dig it in 4 days?
More the no. of people, lesser the days. So, it is an inverse proportion.
Let the required time be x days.
⇒ 10 × 6 = 4 × x
⇒ x = 
= 15 days
4
10 people can dig a trench in 6 days. How many people can dig it in 4 days?
More the no. of people, lesser the days. So, it is an inverse proportion.
Let the required time be x days.
⇒ 10 × 6 = 4 × x
⇒ x = = 15 days