Question
The aeroplane flies along a Square field @ 100, 200, 300
and 400 km/hours respectively. Then find the Average speed of the aeroplane during the whole journey?Solution
Concept of Average Speed: Let Side of a square = L.C.M of 100, 200, 300 and 400 = 1200 Now, Average Speed = (1200 × 4) ÷ ( 1200/100+1200/200+1200/300+1200/400) = (1200 × 4) ÷ 25 = 192 kmph
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