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5. The odometer of a car reads 57321.0 km when the clock shows the time08:30 AM. What is the distance moved by the car, if at 08:50 AM, theodometer reading has changed to 57336.0 km? Calculate the speed ofthe car in km/min during this time. Express the speed in km/h also. |
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Answer» Distance traveled at 8:30 a.m -- 57321 kmFinal distance traveled at 8:50 a.m -- 57336 kmDistance traveled between 8:30 and 8:50 am -- 57336-57321=15 kmTime taken -- 20 mins( since 8:30 to 8:50 is 20 minutes) So,speed of car in km per minute = 15/20 km per min.= 0.75 km per min.in km per hour= 15/20 X 60 = 45 kmph. So the speed of car is 45kmph or 0.75 km per min if it covers 15km in 20 minutes. |
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