Question

Chen is a lorry driver.

He earns a bonus if he drives at least 2.8 kilometres per litre of fuel.
The figures show some information about Chen's last journey.
Journey time 4.5 hours
Average speed 61 km/h
Amount of fuel used 96 litres

Work out whether Chen earned a bonus for this journey.

Answer 1

Yes

Explanation:

Calculating distance travelled by Chen

• Journey time x Average speed
• 4.5 hours x 61 km/h
• 274.5 km

Calculating distance covered per litre of fuel

• Distance covered / Amount of fuel used
• 274.5 / 96
• 2.86 km/litre
• The requirement was 2.8 km/litre
• Therefore, Chen has earned a bonus for this journey

Answer 2

Yes, Chen earned a bonus for the journey.

Explanation:

1 hour = 61 km

4.5 hrs = 61 * 4.5 = 274.5 km

Now,

96 litres = 274.5 km

1 litre = 274.5/96 km

1 litre = 2.859 = 2.9 km (approximately)

So, he drived more than 2.8 kilometers per litre of fuel.