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The distance x metres travelled by a veh...

The distance x metres travelled by a vehicle in time t seconds after the breakes are applied is given by `x=20 t-(5)/(3) t^(2)` . Determine (i) the speed of the vehicle (in km /hr) at the instant the brakes are applied and (ii) the distance the car travelled before it stops.

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The correct Answer is:
`=120-(5)/(3)(36)=120-60=60m`
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