JAMB Mathematics 2007 Objective — Question 27

Question 27 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2007 Objective paper, with the correct answer and a full explanation.

A square has an area of 144cm^2. Find the length of its diagonal.

A. 11 sqrt(3) cm
B. 12 cm
C. 12 sqrt(2) cmCorrect
D. 13 cm

Explanation

Side L = sqrt(144) = 12cm. Diagonal d = sqrt(12^2+12^2) = sqrt(288) = 12.sqrt(2) cm.

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