Question

A car travels 30 km at a uniform speed of 40 km hr^-1 and the next 30 km at a uniform speed of 20 km hr^-1,find it's average speed.

Answer 1

✨✨✨ANSWER✨✨✨

AVERAGE VELOCITY IS

$\frac{30 + 30}{ \frac{30}{40} + \frac{30}{20} } \: km.h {}^{ - 1} \\ = \frac{60 \times 40}{30 + 60} \\ = \frac{2400}{ 90} \\ = 26.67 \: \: km.h {}^{ - 1}$