A motorcyclist travels from A to B at the rate of 20 km/hr and returns from B to A at the rate of 40 km/hr. If the distance between A and B is 60 km, what is the average speed for the entire trip

Foundation

Mathematics Foundation

Properties of Real Number

Ratio Proportion

Time Speed Distance

Question

A motorcyclist travels from A to B at the rate of 20 km/hr and returns from B to A at the rate of 40 km/hr. If the distance between A and B is 60 km, what is the average speed for the entire trip

30 km/hr

$26 \frac{1}{3} km / hr$

60 km/hr

$26 \frac{2}{3} km / hr$

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A.S. = $\frac{2 s_{1} \times s_{2}}{s_{1} + s_{2}} = \frac{2 \times 20 \times 40}{60}$

= $\frac{80}{3} = 26 \frac{2}{3}$ km/hr