A man completes a journey in ten hours. He travels at a speed of 21 km/h for the first half of the journey and at a speed of 24 km/h for the second half. Calculate the total distance travelled (in kilometres).
Answer & explanation
Correct answer: option 2
Let Total Distance covered is = 2D km
According to question ,
\(\frac{D}{21}\) + \(\frac{D}{24}\) = 10 hours
\(\frac{15D}{168}\) = 10 hours
D = 112 km
So , Total distance = 2D = 2 × 112 = 224 km