The triangular field of Hariprasad has sides. If you use 6 lengths of wire along each side, how much barbed wire do you need to fence the field? If the wire is rupees per meter, how much does he have to pay ?

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answer is A.

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Detailed Solution

Concept: You can add the given edge to get the perimeter of the triangle. Second, to find the total length of the wire, you need to take 6 times the circumference. You can then find the cost of the fence by multiplying the cost of the wire per meter by the total length of the wire.:
The lengths of the three sides of the triangular field are

.
Perimeter of the field

Wire length required to cover the field once

The former uses 6 wires on each side, so 6 times the length of the cover panel is required once.

1 meter wire cost

Cost of 1440m

Hence, option 1 is correct.

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