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JSCE Mathematics 2023 Objective — Question 36

Question 36 of 80 from the Junior Secondary Certificate Examination (JSCE) Mathematics 2023 Objective paper, with the correct answer and a full explanation.

What is the area of the shaded part of the wall clock?

Diagram for question 36

A. 25x + 38y unit square
B. 15x + 39y unit squareCorrect
C. 14x + 52y unit square
D. 12x + 58y unit square

Explanation

Outer = 7(3x + 6y) = 21x + 42y. Inner = 3(2x + y) = 6x + 3y. Shaded = 15x + 39y.

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