A car travels from A to B at 80 km/ h and returns at 60 km/h. Find the approx. average speed of the car.
A car travels from A to B at 80 km/ h and returns at 60 km/h. Find the approx. average speed of the car.
एक कार A से B तक 80 किमी/घंटे की गति से यात्रा करती है और 60 किमी / घंटे की गति से वापस आती हैं। कार की लगभग औसत गति ज्ञात कीजिए।
Detailed Solution & Logic
Correct Answer:
68.57 km/h / किमी / घंटा
Average speed (when distances are equal) = $ \frac {2 v_{1} v_{2}}{v_1 + v_2} $
= $ \frac {2 \times 80 \times 60}{80+60} $
= $\frac {9600}{140} $= 68.57
Answer: 68.57 km/h
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