### A passenger travels from Delhi to Merut at a speed of 30 kmph and return with a speed of 60 kmph. What is the average speed? A. 40 B. 45 C. 50 D. 48

$\begin{array}{l}\text{ Average Speed }\\ =\Large\frac{2\times60\times30}{60+30}\\ =\Large\frac{3600}{90}\\ =40\mathrm{kmph}\end{array}$