Correct Answer - Option 2 :
\(28\frac{2}{7}\) Km/hr
Given:
Ram covers 600 km with the speed of 36 km/hr and 720 km with the speed of 24 km/hr
Formula used/Concept Used:
Speed = Distance/time
Average speed = (Total distance)/Total time
Calculation:
The total distance is 1320 km, Let the time when a man covers 600 kilometers is t1 and t2 when the man covers the distance of 720 kilometeRs.
When a man covers 600 kilometers at the speed of 36 km/hr
∴ 36 = 600/t1
⇒ t1 = 50/3
And when covers the distance of 720 kilometers at the speed of 24 km/hr
∴ 24 = 720/t2
⇒ t2 = 30
Now, average speed = [Total distance/(t1 + t2)] = [1320/((50/3) + 30)] = 28\(\frac{2}{7}\) Km/hr
∴ The average speed of a Ram is \(28\frac{2}{7}\) Km/hr
