Question

A fuelling vehicle finished filling a plane with 12.40 tons of fuelat 10:35. If the fuelling rate is 0.20 ton of fuel per min, at whattime did the fuelling start? Give your answer in a 12-hour clockformat, such as 9:00.Enter the answer

Answer 1

Let's define,

X := Total minutes it takes to fill the plane (with fuel)

Then,

$X\cdot0.20=12.40$

Solving it for X, we get

$X=\frac{12.40}{0.20}=62\text{ min}$

This means that the vehicle takes 1 h 2 min to fill the plane. If the fuelling finished at 10:35, it began at

$10-1\colon35-2=9\colon33$

9:33.