Ajay drove for 3 hours at a rate of 50 km per hour and for 2 hours at 60 km per hour. What was his average speed for the whole journey?

60 km/hr

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65 km/hr

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54 km/hr

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50 km/hr

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Solution

The correct option is C
54 km/hr

Total time = 3 + 2 = 5 hours
Total distance = 50 $\times$ 3 + 60 $\times$ 2 = 150 + 120 = 270 km
$A v e r a g e s p e e d = \frac{T o t a l d i s t a n c e}{t o t a l t i m e}$
$A v e r a g e s p e e d = \frac{270}{5}$
= 54 km/hr

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Ajay drove for 3 hours at a rate of 50 km per hour and for 2 hours at 60 km per hour. What was his average speed for the whole journey?

The correct option is C 54 km/hr Total time = 3 + 2 = 5 hours Total distance = 50 × 3 + 60 × 2 = 150 + 120 = 270 km Average speed=Total distancetotal time Average speed=2705 = 54 km/hr

The correct option is C
54 km/hr

Total time = 3 + 2 = 5 hours
Total distance = 50 $\times$ 3 + 60 $\times$ 2 = 150 + 120 = 270 km
$A v e r a g e s p e e d = \frac{T o t a l d i s t a n c e}{t o t a l t i m e}$
$A v e r a g e s p e e d = \frac{270}{5}$
= 54 km/hr