1.

A train covers first 120 Km in 2 hours, next 160 Km in 3 hours and last 140 Km again in 2 hours. Find the average speed of the train1. 15 km/h2. 25 km/h3. 60 km/h4. None of above

Answer» Correct Answer - Option 3 : 60 km/h

Given: 

Distance (D1) = 120 km  (D2) = 160 km and (D3) = 140 km 

Time (T1) = 2 hours  (T2) = 3 hours and  (T3) = 2 hours.

Concept:

Average speed = (Total distance covered throughout the journey)/ (Total time taken for the journey).

Calculations:

Total DIstance = (120+ 160 +140) km = 420 km

Total Time = (2 + 3 +2) hours = 7 hours

Average speed = 420/7 = 60 km/hr

∴ The average speed of the train is 60 km/hr



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