Question

find the cost of laying grass in a triangular field of sides 51 metere 37metere and 20metere the rate of rupees 7 per metre square​

Answer 1

Given that

a = 50 m

b = 65 m

c = 65 m

$s \: = \frac{180}{2} = 90m$

Area of Triangular Field

$= \sqrt{s(s - a(s - b(s - c)}$

$= \sqrt{90 - (90 - 50)(90 - 65)(90 - 65}$

$\sqrt{90 \times 40 \times 25 \times 25} = 25 \sqrt{60 \times 60}$

= 25 × 60 = 1500

Cost of Laying grass 7 rs per m²

= 1500 × 7m² = 10,500 rs

Answer 2

Answer:

Given that

a = 50 m

b = 65 m

c = 65 m

$s \: = \frac{180}{2}$

=90 m

Area of Triangular Field

$\sqrt{s(s - a(s - b(s - c)}$

$= \sqrt{90 - (90 - 50)(90 - 65)(90 - 65}$

$\sqrt{90 \times 40 \times 25 \times 25} = 25 \sqrt{60 \times 60}$

=25

60×60

= 25 × 60 = 1500

Cost of Laying grass 7 rs per m²

= 1500 × 7m² = 10,500 rs