(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.

.

The rate of change in velocity is acceleration:.

.

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The velocity at  is,

.

Substitute initial velocity .

.

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: .

.

The distance at  is,

.

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.