Question

the ratio between the sides of a triangle are 3:5:7 and its perimeter is 300 cm find the sides of triangle

Answer 1

here your answer...
let 3:5:7 be 3x +5x+7x .
3x +5x+7x =300
15 x=300
x = 300/15
x = 20...
3x = 3*20=60..
5x = 5*20=100..
7x=7*20= 140....

hope it helps you...

Answer 2

perimeter of triangle=300cm
sides are in ratio 3:5:7
3x+5x+7x=300
15x=300
x=300÷15
x=20