Question
A car travels from A to B at a speed of 60 km/h, and
returns from B to A at a speed of 40 km/h. What is the average speed of the car for the entire journey?Solution
Average speed for the entire journey = 2xy / (x + y) Where x = 60 km/h and y = 40 km/h. Average speed = 2 × 60 × 40 / (60 + 40) = 4800 / 100 = 48 km/h Correct Option: a
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