A plane tiles 90km on a bearing 030° and then flies 150km due east. How

MATHEMATICS

WAEC 1993

A plane tiles 90km on a bearing 030° and then flies 150km due east. How far east of the starting point is the plane?

A. 120km
B. 165km
C. 195km
D. (150 + 45√3)km

Correct Answer: C. 195km

Explanation

^x/₉₀ = sin30^o

x = 90 x sin30 = 45^o

?Dist = 150 + 45 = 195km

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