2. a) A dozer with a blade capacity of 3m has to strip soil that has a swelling factor
of 25% in thin horizontal layers for a distance of 50m. The dozer's forward speed is
2km/hr and return speed is 5km/hr. In each cycle it consumes a fixed time of 0.4
mins. for shifting gears, adjusting blade, etc. Compute the output of the dozer.