if a car uses 1/3 of a tank of petrol on the first part of the journey then 2/5 of a tank of petrol on the second part on the jo

Question

Mnenie [13.5K]

3 years ago

11

if a car uses 1/3 of a tank of petrol on the first part of the journey then 2/5 of a tank of petrol on the second part on the jo

urney and has 8 litres how many litres of petrol did it have before the journey

Mathematics

1 answer:

Ainat [17] · Answer 1 · 2022-05-07T07:34:49+03:00

Ainat [17]3 years ago

8 0

We assume the petrol tank was full at the beginning of the journey.

The petrol tank holds x litres.

x - 1/3 x - 2/5 x = 8

15x/15 - 5x/15 - 6x/15 = 8

4x/15 = 8

4x = 120

x = 30

The petrol tank holds 30 litres.