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A man travels 50 km at speed 25 km/hr and next 40 km at 20 km/hr and there after travel 90 km at 15 km/hr. His average speed is :
Answer & Solution
Correct Answer:
Option
A
$$\eqalign{
& {\text{Average speed }} = \frac{{{\text{Total distance }}}}{{{\text{Total time}}}} \cr
& {\text{Average speed}} = \frac{{50 + 40 + 90}}{{2 + 2 + 6}} \cr
& {\text{Average speed}} = \frac{{180}}{{10}} \cr
& {\text{Average speed}} = 18{\text{ km/hr}} \cr} $$
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