ABC26GN4585 · Area
Subject: General Aptitude · Chapter: Area · Exam: · Marks: · Difficulty:
A circular ground whose diameter is 35 metres, has a 1.4 m broad garden around it. What is the area of the garden in square meters?
(a)160.16
(b)176.16
(c)196.16
(d)Data inadequate
(e)None of these
Answer
Explanation
Radius of the ground $=17.5 \mathrm{m}$. Radius of inner circle $$=(17.5-1.4) \mathrm{m}=16.1 \mathrm{m} .$$ Area of the garden $=\pi \times\left[(17.5)^{2}-(16.1)^{2}\right] \mathrm{m}^{2}$ $$\begin{aligned} & =\left[\frac{22}{7} \times(17.5+16.1)(17.5-16.1)\right] \mathrm{m}^{2} \\ & =\left[\frac{22}{7} \times 33.6 \times 1.4\right] \mathrm{m}^{2}=147.84 \mathrm{m}^{2} . \end{aligned}$$
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