Subject: General Aptitude · Chapter: Area · Exam: · Marks: · Difficulty:
What will be the cost of gardening 1 metre broad boundary around a rectangular plot having perimeter of 340 metres at the rate of ₹ 10 per square metre?
(a)₹ 1700
(b)₹ 3400
(c)₹ 3440
(d)Cannot be determined
(e)None of these
Answer
Answer (as printed): C
Explanation
$2(l+b)=340$ (Given). Area of the boundary $$\begin{aligned} & =[(l+2)(b+2)-l b]=2(l+b)+4=344 . \\ & \therefore \text { Cost of gardening }=₹(344 \times 10)=₹ 3440 . \end{aligned}$$
Explanation as extracted from the printed page; notation may be imperfect.