Question

Kevin can paint a small room in 18 hours. Kevin and Caleb together can paint the same room in 15 hours.

How long would it take for Caleb to paint the room alone?

Answer 1

90 hours

Explanation:

The computation of the time taken for Caleb to paint the room alone is given below:

Given that

Kevin paint a small room in 18 hours

And, kevin & caleb together paint the same room in 15 hours

So, time taken for Caleb to paint the room alone is

Let us assume the same be x

Kevin time taken + caleb time taken = total time taken

`(1)/(18) + (1)/(x) = (1)/(15)\\\\ (1)/(x) = (1)/(15) - (1)/(18)\\\\ (1)/(x) = (6-5)/(90) \\\\ (1)/(x) = (1)/(90)`

x = 90 hours