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A man makes his onward journey at 16 km/hr and backward journey at 28 km/hr. What is his average speed during the entire journey (correct to 2 decimal places)? |
20.36 km/hr 20.36 km/hr 32.15 km/hr 30.56 km/hr |
20.36 km/hr |
S1 = 16 km/h S2 = 28 km/h Average speed = \(\frac{2 × 16 × 28}{16 + 28}\) = 20.36 km/h |
