Sachin covers a certain distance by car driving at 80 km/h and he returns to the starting point riding on a scooter at 50 km/h. Find his average speed for the whole journey up to 2 decimal places.

Correct option is A

Given:
Time taken to cover the distance by car = 80km/ hours
Time taken to cover the distance by scooter = 50km/ hours
Formula Used:
Average Speed=$$\frac{2 \times Speed_1​×Speed_2​​}{Speed_1​+Speed_2}​$$​​
Solution:
$$Speed_1$$​=80km/h (speed while going)
$$Speed_2$$​=50 km/h (speed while returning)
Average Speed=$$\frac{2×80×50​}{80+50}$$​​
​$$= \frac{2×80×50}{130}\\\ \\=\frac{8000}{130}$$​​
= 61.54km/h