Which of the following figures has the longest perimeter? · ABC26GN4529
Subject: General Aptitude · Chapter: Area · Exam: P.C.S., 2009; R.R.B. 2006
Which of the following figures has the longest perimeter?
(a)A square of side 10 cm
(b)A rectangle of sides 12 cm and 9 cm
(c)A circle of radius 7 cm
(d)A rhombus of side 9 cm
Answer
Explanation
(a) Perimeter $=(4 \times 10) \mathrm{cm}=40 \mathrm{cm}$. (b) Perimeter $=2(12+9) \mathrm{cm}=42 \mathrm{cm}$. (c) Perimeter $=\left(2 \times \frac{22}{7} \times 7\right) \mathrm{cm}=44 \mathrm{cm}$. (d) Perimeter $=(4 \times 9) \mathrm{cm}=36 \mathrm{cm}$.
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