Question

The odometer of a car reads 57321 km then clock shows 3:50 am.What is the distance moved by the car at 8:50 am the odometer has changed to 57336. Calculate the speed of a car in km/h.

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student-name Shreya Chakraborty asked in Science
The odometer of a car reads 57321.0 km when the clock shows the time 08:30 AM. What is the distance moved by the car, if at 08:50 AM, the odometer reading has changed to 57336.0 km? Calculate the speed of the car in km/min during this time. Express the speed in km/h also.
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student-name Meetu_m answered this
9653 helpful votes in Science, Class X
Initial reading of the odometer of the car = 57321.0 km

Final reading of the odometer of the car = 57336.0 km

Distance covered by the car

= Final reading of the odometer of the car − Initial reading of the odometer of the car

= 57336.0 − 57321.0 = 15 km

The given car starts at 8:30 a.m. and stops at 8:50 a.m.

Therefore, time taken by the car to cover the distance is (8:50 − 8:30) min = 20 min

Distance covered by the car = 15 km

Time taken by the car = 20 min

So speed is 0.75km/min


Again,

60 min = 1 h

20 mins =1/3 hr

Time taken by the car = 1/3h
So speed = 45 km per hour

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