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=(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.