Ankit drives 120 km at 60 km/hr and the next 120 km at 40 km/hr. His average speed during the entire trip is:

50 km/hr

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42 km/hr

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60 km/hr

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48 km/hr

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Solution

The correct option is D
48 km/hr

Total time taken = $\frac{120}{60} + \frac{120}{40}$ = 5 hrs
Average speed = $\frac{t o t a l d i s t a c e}{t o t a l t i m e}$
= $\frac{240}{5}$
= 48 km/hr

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Ankit drives 120 km at 60 km/hr and the next 120 km at 40 km/hr. His average speed during the entire trip is:

The correct option is D 48 km/hr Total time taken = 12060+12040 = 5 hrs Average speed = total distacetotal time = 2405 = 48 km/hr

The correct option is D
48 km/hr

Total time taken = $\frac{120}{60} + \frac{120}{40}$ = 5 hrs
Average speed = $\frac{t o t a l d i s t a c e}{t o t a l t i m e}$
= $\frac{240}{5}$
= 48 km/hr