DieselShip's Online Content Library

Q1. (a) Tank A contains a fuel mixture of petrol and oil in the ratio 12:1 and tank B contains a fuel mixture of petrol and oil in the ratio 11:2.

Determine the ratio in which fuel should be drawn from A and B to give a petrol and oil mixture in the ratio 10:1. (8)

(b) The crippling load, P, for a steel rod is directly proportional to the fourth power of its diameter, D, and is inversely proportional to the square of its length, L.

Determine the approximate percentage change in P if D is increased by 1% and L is decreased by 1%. (8)