Question

A man walks 10 km, then travels a certain distance by train and then by bus as far as twice by the train. 1f the whole journey is of 70km, how far did he travel by train?

Answer 1

The distance travelled by walk = 10 km

Let the distance travelled by train = x km say. 

The distance travelled by bus

= 2 × x = 2x km 

∴ 10 + x + 2x = 70 

⇒ 3x = 70 – 10 

⇒ 3x = 60 

⇒ x = \(\frac{60}3\) = 20 

⇒ x = 20 

∴ The distance travelled by train = 20 km.