Question

the sides of a triangle are in the ratio 1 : 3 : 5 and it's perimeter is 180 cm . the length of its largest side is ?​

Answer 1

Answer:

Let the side be 5x,3x and 4x

5x+3x+4x=180

12x=180

x=15

Sides =75,45,60

(i) S =

2

75+45+60

=

2

180

=90

Area =

90(90−75)(90−45)(90−60)

=

90×15×45×30

=1350m

2

(ii)

2

1

×75×a=1350 [Ref. image]

a=36m

(iii) Total cost =10×Area

=10×1350

=Rs.13500

solution

Answer 2

Answer:

20cm , 60 cm and 100 cm

so length of largest side is 100cm

Step-by-step explanation:

Perimeter= a + b + c

( here we should use linear equations in one variable )

180 = 1x + 3x + 5x

180 = 9x

x = 180/9

x = 20

Sides

1x = 1×20=20

3x = 3×20= 60

5x = 5×20=100

So sides are 20 cm 60 cm 100 cm..

Hope it helps you..