(a)

The initial velocity is km/h.

The final velocity is km/h.

The time seconds.

Convert the velocity in meter per second.

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.

Find acceleration.

The car travels with a constant acceleration.

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The rate of change in velocity is acceleration:.

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The velocity at is,

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Substitute initial velocity .

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The velocity .

The velocity at is,

Substitute .

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The acceleration is m/sec/sec.

(b)

Find distance the car travels during the  seconds.

The rate of change in position is velocity: .

.

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The distance at is,

.

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The distance at is,

The distance travel by car during seconds is m.

(a) The acceleration is m/sec/sec.

(b) The distance travel by car during seconds is m.