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A car travels 30 km at an uniform speed of 40 km per hour and the next 30 km at a uniform speed of 20 kilometre per hour find its average speed |
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Answer» ANS 1st Fomula:AVERAGE Speed = Total Distance / Total TimeSpeed = Distance / TimeTime = Distance / SpeedTime1 = 30 / 40 = 0.75 hoursTime2 = 30 / 20 = 1.5 hoursAverage Speed = (30 + 30) / ( 1.5+0.75)Average Speed = 60 / 2.25Average Speed = 60 / 2.25Average Speed = 26.667 km/hr Ans 2 and 3 in image |
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