Question

The concert lasted two hours. For how many minutes did the chorus perform alone?

Answer 1

In order to find how many minutes the chorus performed, let's convert the time of 2 hours into minutes.

To do that conversion, we need to know that 1 hour is equal to 60 minutes.

Then, we can write the following rule of three:

`\begin{gathered} \text{hours}\to\text{minutes} \\ 1\text{ hour}\to60\text{ minutes} \\ 2\text{ hours}\to x\text{ minutes} \end{gathered}`

From this rule of three, we can write the following equation and solve it for x:

`\begin{gathered} (1)/(2)=(60)/(x) \\ 1\cdot x=2\cdot60 \\ x=120 \end{gathered}`

Therefore the chorus performed for 120 minutes.