Question 54

Aman goes from A to B at a speed of 40 km/h. Using the same route, he comes back from B to A, at a speed of 55 km/h. What is his approximate average speed for the whole journey?

Solution

approximate average speed = $$\frac{2\times\ Speed_1\times Speed_2\ }{Speed_1+Speed_2}$$

= $$\frac{2\times40\times55\ }{40+55}$$

= $$\frac{4400}{95}$$

= 46.32 km/h

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