This was another unpopular question among the candidates and their performance in it was not encouraging. However, candidates performed better in part (a) than in part (b).
In part (a), the cost price is given by
Profit x 100 = 25 from where we obtain the cost price as N480
Cost price 1
The selling price when a discount of 6% is given = 94/100 x 600/1 = N 564.00. Therefore, actual profit = N 564 –
N 480 = N 84.00
One of their problems in part (b) is that they did not change the time to one unit, either hours or minutes. Many used the two units together. Some who changed 6 minutes to 0.1 hour could not handle the multiplication of decimals hence, could not arrive at the correct normal average rate which was 3km/h. 
