Question

A painter can paint 1/2 a room in 1 1/2 hours. How many of the same-sized rooms can he paint per hour?

Answer 1

1/3 a room

Explanation:

we know that

A painter can paint 1/2 a room in 1 1/2 hours

so

using proportion

Find out how many of the same-sized rooms can he paint per hour

Remember that

`1(1)/(2)=(1*2+1)/(2)=(3)/(2)`

Let

x -----> the number of the same-sized rooms

`((1/2))/((3/2))(room)/(hours) =(x)/(1)(room)/(hour)\\\\x=(1)/(3)\ room`