Question

The odometer of a car reads 57321.0 KM when the clock shows the time 8.30 AM. what is the distance moved by the car if at 8.50 AM, the odometer reading has changed to 57336.0 KM? (a) calculate the speed of the car in km/ min during this time.(b) Express the speed in km/h also.

Answer 1

Initial Reading of the odometer ( u ) = 57321.0 km

Final Reading of the odometer ( v ) = 57336.0 km

Distance covered by the car = v - u

= 57336.0 - 57321.0 = 15 km

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Car starts at -----  8:30 a.m

Stops at -------- 8:50 a.m.

Time taken by the car to cover the distance = 20 min

Distance covered by the car = 15 km

Time taken by the car = 20 min

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A)     Speed = D/T

= $\frac{15}{20} = 0.75KM/MIN$

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B)    

We know that 60m = 1hr

So,  $20m = \frac{1}{60} X 30 = \frac{1}{3} hr$

Time taken by car = $\frac{1}{3}hr.$

Now,

Speed = D/T

$\frac{15}{\frac{1}{3}}= 45km/hr$

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Answer 2

Explanation:

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