A motor car goes to a place at a speed of 23 km/h and returns at a speed of 33 km/h. The average speed (in km/h) of the motor car in the entire journey is:

Correct option is A

Given:

Speed to the place = 23 km/h

Speed for the return journey = 33 km/h

Need to find the average speed for the entire journey

Formula Used:

Average speed = $$\frac{2 \times \text{Speed}_1 \times \text{Speed}_2}{\text{Speed}_1 + \text{Speed}_2}$$​​

​Solution:​

Average speed = $$\frac{2 \times 23 \times 33}{23 + 33}$$​​

= $$\frac{2 \times 23 \times 33}{56}$$​​

​$$= \frac{1518}{56}$$​​

​$$= 27\frac3{28} \ \text{km/h}$$​​