Question

A plane flies 405km on90 litres of fuel. (1)how much fuel is needed for 540km? (2)how far can it go in 50 litres

Answer 1

(a) the fuel which is needed for 540 kilometre=(405/90)540=45(540)=24300 litres

I don't know the another

Answer 2

1)

405 : 90 : : 540 : x

x × 405 = 90 × 540

x = (90 × 540) ÷ 405

x = 120

120 ltrs is needed to fly 540 km

therefore per 1 ltr it flies 4.5 km

2)

in 50 ltrs it can fly

4.5 × 50 = 225 kms