| What will be the cost of gardening 1 m broad boundary around a rectangular plot having perimeter of 340 m at the rate of \[Rs.10\,per{{\operatorname{m}}^{2}}?\] |
A) Rs. 3400
B) Rs. 1700
C) Rs. 3440
D) Cannot be determined
E) None of the above
Correct Answer: C
Solution :
| Area of boundary \[=\,\,(l+2)(b+2)-lb\] |
| \[=lb+2\,(l+b)+4-lb\] |
| \[=2\,(l+b)+4\] |
| \[=340+4=344{{m}^{2}}\] |
| \[\therefore \] Total cost \[=344\times 10=Rs.\,3440\] |
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