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?  Pick one
A) 3400	B) 1700	C) 3440	D) Cannot be determined	E) None of these
Let l and b be the length and breadth of rectangular plot respectively.   ∴ According to the question,we have   2(l + b) = 340 ⇒ l + b = 170   Now, (l + 2) and (b + 2) be the length and breadth of plot with boundary.   ∴ Required area = (l + 2) (b + 2) – lb   = lb + 2l + 2b + 4 – lb   = 2(l + b) + 4 = 344   ∴ Required cost = 344 × 10 = 3440   Answer 3440
<result>C</result>
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?