Chapter 11.1, Problem 87E

To determine

To find out the number of hours that $18$ painters will take to paint the room.

Answer to Problem 87E

  $21\frac{1}{3}\text{ hours}$

Explanation of Solution

Given:

  $8$ Painters can paint the room in $48$ hours.

Calculation:

Since $8$ painters can paint the room in $48$ hours.

Therefore $1$ painter can paint the room in $48\times 8$ hours.

Therefore, number of hours taken by $18$ painters to paint the room is

  $\begin{array}{l}=\frac{48\times 8}{18}\\ =\frac{64}{3}=21\frac{1}{3}\text{ hours}\end{array}$