??? - 2015 JUNE Q9 Answers
(i) Jean is designing a model aeroplane. Fig. 9.1 shows her first sketch of the wing’s cross-section. Calculate angle A and the area of the cross-section. [5]
(ii) Jean then modifies her design for the wing. Fig. 9.2 shows the new cross-section, with 1 unit for each of x and y representing one centimetre.
(ii) Jean then modifies her design for the wing. Fig. 9.2 shows the new cross-section, with 1 unit for each of x and y representing one centimetre.
Here are some of the coordinates that Jean used to draw the new cross-section.
Use the trapezium rule with trapezia of width 4cm to calculate an estimate of the area of this cross-section. [6]
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