Question

A train travels 120km to the nearest kilometer for 3.5 hours correct to the 2 significant figures.

Calculate the least speed of the train to 2 decimal places.

Answer 1

Least speed = 33.66 km/h

Explanation:

The least distance is 119.5 km, and the most time it took was 3.55 hours.

Therefore the least speed = least distance/most time

= 119.5/3.55 km/h

= 33.66 km/h