Question 1060543

A building needed 14 windows. The builder had already installed 5 of them. If it takes four hours to install each window. How long will it take him to install the rest?   I have tried subtracting 14 and 5 and then multiplying 9 and 4 and getting 36, but i am no sure if it is right.
<pre>You're right! Good job!
By the way, it should be: I have tried subtracting <s>14</s> 5 <s>and</s> from <s>5</s> 14......