ABC26GN4530 · Area
Subject: General Aptitude · Chapter: Area · Exam: · Marks: · Difficulty:
Which one of the following has a greater perimeter than the rest?
(a)A square with an area of 36 sq. cm
(b)An equilateral triangle with a side of 9 cm
(c)A rectangle with 10 cm as length and 40 sq. cm as area
(d)A circle with a radius of 4 cm
Answer
Explanation
(a) Side $=\sqrt{36} \mathrm{cm}=6 \mathrm{cm}$. Perimeter $=(4 \times 6) \mathrm{cm}=24 \mathrm{cm}$. (b) Perimeter $=(3 \times 9) \mathrm{cm}=27 \mathrm{cm}$. (c) Breadth $=\left(\frac{40}{10}\right) \mathrm{cm}=4 \mathrm{cm}$. $$\text { Perimeter }=2(10+4) \mathrm{cm}=28 \mathrm{cm} .$$ (d) Perimeter $=\left(2 \times \frac{22}{7} \times 4\right) \mathrm{cm}=\left(\frac{176}{7}\right) \mathrm{cm}=25.14 \mathrm{cm}$.
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