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motion

Asked by fathima12 19th September 2009, 4:02 PM
Answered by Expert
Answer:

Average speed = total distance / total time = 400 / 90 = (40 / 9) km/hr

Required ratio = 90 x 9 / 40 = 81 : 4

Answered by Expert 20th September 2009, 11:38 AM
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