Academics – Mathematics : 2013/MAR/01
Question
Q1. (a) An alloy is made by combining metal A with metal B such that the ratio of their volumes is 7:5 respectively. The relative density of A is 8.9 and that of B is 7.1.
Determine the percentage mass of EACH of the metals. (8)
(b) A rod 5.2 metres long is cut into 4 lengths A, B, C and D.
A is 10% longer than B. B is 1.6 m longer than C. D is 50 % longer than C.
Calculate the lengths of A, B, C and D. (8)
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