Q4 of 54 Page 168

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


More from this chapter

All 54 →
2

The cost of 140 tennis balls is Rs.4900. Find the cost of 2 dozen such balls.

 3

The railway fare for 61 km is Rs.183. Find the fare fare for 53 km.

 5

30 men can finish a piece of work in 28 days. How many days will be taken by 21 men to finish.

 6

A garrison of 200 men had provisions for 45 days. After 15 days, 40 more men join the garrison. Find the number of days for which the remaining food will last.