Question

An airplane travels at a speed of 400 km/hr for 2 hours, slows to 300 km/hr for the next hour and then travels the final 2 hours at a speed of 350 km/hr. What is the average speed of the plane for this trip?

Answer 1

360 km/h

Step-by-step explanation:

Velocity =Distance/time ⇒ distance = velocity×time

Distance for 1st 2 h = 400×2 = 800 km

Distance for next 1 h = 300×1 = 300 km

Distance for last 2 h = 350×2 = 700 km

Therefore total distance traveled = 1800 km

So average speed = 1800/5 = 360 km/h