A truck covers 30% of a total distance at 40 km/h and the…

A truck covers 30% of a total distance at 40 km/h and the remaining 70% at 60 km/h. What is the average speed for the entire trip?

Show answer & explanation

Correct answer: B

Explanation

The correct answer is option 2 i.e. 52.2 km/h.

Let total distance = 100 km

Distance₁ = 30 km, Speed₁ = 40 km/h

Distance₂ = 70 km, Speed₂ = 60 km/h

Average speed = Total distance ÷ Total time

Average speed = $\frac{100}{\left(\frac{30}{40}\right) + \left(\frac{70}{60}\right)}$ = 52.2 km/h

SSC CGL 2025 PYQ — Question 63