Example 9 If 15 workers can build a wall in 48 hours, how many workers will be required to do the same work in 30 hours?
Given,
15 workers can build a wall in 48 hours
We need to find how many workers will do the same work in 30 hours
Let the number of workers be x
Thus, our table looks like
As we increase the number of workers,
time taken to build the wall decreases
∴ They are in inverse proportion
15 × 48 = 𝑥 × 30
(15 × 48)/30 = 𝑥
(1 × 48)/2 = 𝑥
24 = 𝑥
𝑥 = 24
∴ 24 workers are required to build the wall
(𝑥1𝑦1=𝑥2𝑦2)

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

Hi, it looks like you're using AdBlock :(

Displaying ads are our only source of revenue. To help Teachoo create more content, and view the ad-free version of Teachooo... please purchase Teachoo Black subscription.

Please login to view more pages. It's free :)

Teachoo gives you a better experience when you're logged in. Please login :)

Solve all your doubts with Teachoo Black!

Teachoo answers all your questions if you are a Black user!