A triangular park ABC has sides …
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A triangular park ABC has sides 120m , 80m and 50m . A gardener has to fence all around it and also plant grass inside . How much area does he need to plant ? Find the cost of fencing it with barbed wire at the rate of RS 20 per metre leaving a space of 3m wide for a gate on one side .
Posted by Ridhima Choudhary 4 years, 3 months ago
- 1 answers
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Gaurav Seth 4 years, 3 months ago
given the sides of the triangular park are 120m, 80m and 50m.
perimeter of the triangular park = 120m + 80m + 50m
= 250m
therefore it's semi-perimeter = 250/2
= 125m
hence, the gardener have to plant grass in 1452.36m²
now we have to find the cost of fencing the field with a barbed wire at the rate of rs 20 per m leaving a space of 3m wide for a gate.
therefore the gardener have to fence = 250 - 3
= 247m
so total cost of fencing at the rate of rs 20 per meter = 247 × 20
= rs 4940
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