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)?
Answer & explanation
Correct answer: option 1
S1 = 16 km/h
S2 = 28 km/h
Average speed = \(\frac{2 × 16 × 28}{16 + 28}\) = 20.36 km/h