DieselShip's Online Content Library

Q1. (a) The cost of manufacturing a propulsion unit is made up of material costs, labour costs and overhead costs in the ratio 5:3:2.

Determine the percentage rise in the manufacturing cost when the cost of materials rises by 9%, the cost of labour rises by 5% and the cost of overheads falls by 3%. (10)

(b) Water escapes from an engine’s cooling system at the rate of 3% per week.

The system was initially filled with 44 litres of coolant.

One litre of water is added at the end of each week.

Calculate the volume of coolant in the system at the start of the fifth week. (6)