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Area of a Triangle - by Heron's Formula

A triangular ...

Question

A triangular park ABC has sides 120 m, 80 m and 50 m. A gardener, Dhania has to put a fence all around it and also plant grass inside. The area required and the cost of fencing it with barbed wire at the rate of Rs. 20 per metre leaving a space 3 m wide for a gate on one side will be

A

375 √15 m², Rs. 5263

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B

275 √15 m², Rs.4490

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C

375 √15 m², Rs. 4940

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D

275 √15 m², Rs. 4897

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Solution

The correct option is C
375 √15 m², Rs. 4940

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