Question

A car travels half the distance with constant velocity $50$ km/h and another half with a constant velocity of $40$ km/h, along a straight line. The average velocity of the car in km/h is?

• A. $45$
• B. $44.4$
• C. $0$
• D. $\sqrt{(50\times 40)}$

Answer 1

The correct option is B $44.4$

Average velocity$=\frac{2V_1{V}_2}{V_1+V_2}$

Average velocity$=\frac{2\times 40\times 50}{40+50}$

So, Average velocity = 44.40 km/hr.