Question

While travelling on the Tranz Alpine train from Christchirch to Greymouth, Matt passed a sign saying “Greymouth 130 kilometers.” After the train had travelled another 25 kilometers, Matt saw another sign saying “Christchurch 120 kilometers”.

How far is it by train from Christchurch to Greymouth?

Answer 1

225 kilometres

Explanation:

When Matt sees the sign that says "Greymouth 130 kilometres", he is 130 km away from Greymouth.

After the train travels for 25 km, Matt is 105km (130km-25km) away from Greymouth. He also sees the sign saying that Christchurch is 120 km away.

So, the distance between Greymouth and Christchurch must be 225km (105km+120km) by train.