Physics

Problem

A car travels from

A

B

at a speed of

20 \text{ km/hr}

and returns at a speed of

30 \text{ km/hr}

. The average speed of the car for the whole journey is [MP PET 1985] (a)

25 \text{ km/hr}

(b)

24 \text{ km/hr}

(c)

50 \text{ km/hr}

(d)

5 \text{ km/hr}