Question

1. An airplane flies with a constant speed of 720 km/h. How long will it take to travel a distance of 1500

kilometers?

Answer 1

`125\:\mathrm{minutes\: or\: }2.08\bar{3}\: \mathrm{hours}`

Step-by-step explanation:

Speed is given by
`s=(d)/(t)`, where
`d` is distance travelled and
`t` is time. Rearranging this equation, we have
`t=(d)/(s)`.

Plugging in our given information:

`t=(d)/(s)=\frac{1500\:\mathrm{km}}{720\:\mathrm{km/h}}=2.08\bar{3}\: \mathrm{hours}`

Thus, our answer is:

`2.08\bar{3}\: \mathrm{hours}\cdot \frac{60\:\mathrm{minutes}}{1\:\mathrm{hour}}=\fbox{$125\:\mathrm{minutes}$}`