Question

An airplane traveled 1,991.25 kilometers at an average speed of 885 kilometers per hour. How long did it take for the airplane to travel this distance? hours and minutes

Answer 1

This trip would take 2 hours and 15 minutes, since 1,991.25/885=2.25. This means it would take two hours and 25/100 (1/4) of an hour. 1/4 of an hour is 15, so you add 15 minutes to 2 hours.

Answer 2

Answer:

It took 2 hours and 15 minutes for the airplane to travel 1,991.25 Km

Step-by-step explanation:

In order to find the time, you need to use the fact that average speed = distance traveled/time taken, the problem gives you that the distance traveled is equal to 1,991.25 Km and the average speed is 885 Km/h.

So, you use these values to find the time taken as follows:

$time = \frac{distance}{speed}=\frac{1991.25 km}{885 \frac{km}{h}} = 2.25 h$

2.25 is a number made by two parts: integer-part and fractional-part.

The integer-part is equal to 2 hours.

The 0.25 is the fractional-part and corresponds to the minutes. 0.25 in fraction is $0.25 = \frac{1}{4}$, the hour has 60 minutes, so when you divided by  $\frac{1}{4}$ you the get 15 minutes.