An airplane flies along the four sides of a square at the speeds of 200, 400, 600 and 800 km/hr. Find the average speed of the plane around the field.

1. An airplane flies along the four sides of a square at the speeds of 200, 400, 600 and 800 km/hr. Find the average speed of the plane around the field.

[Senior Officer 2019 [MCQ] : 2019]

1. 432 km/hr

2. 375 km/hr

3. 384 km/hr

4. 221 km/hr

Answer

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