Question

find the cost of laying Grass in a triangular field of side 50m 65m 65m at the rate of rupees 7 per metre

Answer 1

Answer:

TRIANGULAR FIELD AREA = BY EURON'S FORMULA

                                                  S = 50 + 65 + 65/ 2

                                                       = 90

                                                AREA = √90 ( 90-50)(90-65)(90-65)

                                                           = √ 90 * 40 * 25 * 25

                                                            = 25 √ 9 * 10 * 4 * 10

                                                            = 25 * 3 * 10 * 2

                                                             = 1500 METRE ²

cost of laying GrASS = 7 rs

cost of laying GrASS in the field = 1500 * 7

                                                        =  10500 rs

hope it helps :)

Answer 2

$\huge\mathfrak{Answer}$

Here 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

#BAL