Rahul travels a certain distance at a speed of 4 km/h and returns at a speed of 3 km/h via same route. What was his average speed for the entire journey (correct to 2 decimal places)?

Correct option is A

Given:
Speed on the way out 4 km/h
Speed on the way back 3 km/h
Formula Used:
Average speed = $$\frac{2s_1s_2}{s_1+s_2}$$​​
Solution:
Average speed = $$\frac{2s_1s_2}{s_1+s_2}$$= $$\frac{2 \times 4 \times 3}{4 + 3} = 3.43 \, \text{km/h}$$​​