Question

A motorist traveled 190 km in 5 hours. His average speed for first 100 kilometres was 50 km/h. What was his average speed for the second 90 kilometres?

• A. 30 km/h
• B. 3.33 km/h
• C. 30.03 km/h
• D. 33.33 km/h

Answer 1

The correct option is D

33.33 km/h

Given:

Total distance travelled = 190 km

Total time taken = 5 hours

Time taken to cover the first 100 km = $\frac{100}{50}$ = 2 hours

So, the next 90 km will be covered in 3 hours

Hence, the average speed for the next 90 km = $\frac{90}{3}$ = 30 km/h