Question

The sides of triangle are n the ratio 1:3:4 if the perimeter is 42 cm find its side

Answer 1

Let the side be x

First side :- x cm
second side :- 3x cm
Third side :- 4x cm







Perimeter = 42


Side 1 + S2 + S3 = 42

x + 3x + 4x = 42

8x = 42

x = 42/8

x = 5.25

First side :- x = 5.25 cm




Second side :- 3x = 15.75 cm





Third side :- 4x = 21 cm

Answer 2

Let the side of triangle be x

then ,

1st side = x
2nd side = 3x
3rd side = 4x


Perimeter = 42

( Perimeter of a figure is the sum of all side in the figure )

Since triangle have 3 side,

hence ,

Side1 + Side 2 + Side 3 = 42 cm

x + 3x + 4x = 42

8x = 42

x = 42/8

x = 5.25

1st side :- ( x ) = 5.25 cm

2nd side :- ( 3x ) = 15.75cm

3rd side :- ( 4x ) = 21 cm