3 Exercise 170 90 m 1. Hariprasad's triangular field has sides of 90 m, 80 m and 70 m. How much barbed wire will he need for fencing the field if he uses 3 lengths of wire along each side? How much will he have to pay for the wire if it costs Rs 50 Gc di bu per metre? 70 m
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Answer:
he has to pay 3500 rupees
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Answer:
Step-by-step explanation:
Given :-
Let the sides of the triangular field be a, b and c
Sides of the triangular field :-
a = 90m
b = 80m
c = 170m
Here, we've to find the length of barbed wire to fence the triangular field thrice.
So first of all, we needa find it's perimeter.
We know that,
Perimeter of a triangle = sum of all three sides
» Perimeter of triangular field = 90 + 80 + 170
= 340m
» Total length of barbed wire required to fence Hariprasad's triangular field thrice = 340 × 3
= 1020m
He needs 1020m to fence all the sides three times.
Now total cost of fencing @ rupees 50 per meter = 1020 × 50
= Rupees51000
Hence, Hariprasad has to pay Rs 51000
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