Question

side of a tringle are in the ratio of 7:3:5 and its perimeter is 300 cm . find its area​

Answer 1

Answer:

7X+3X+5X=300

X=300/15

X=20

So Sides Are 7X=140

3X=60

5X=100

S=sum of all Sides So √s(s - a) (s - b) (s - c)

S here is 300

S-a = 160

S-b = 240

S-c= 200

So Root 300*160*240*200

=2,304,000,000

48000Ans

It took so long calculation And your  Question was quite tough

Hope it helped you

Answer 2

Answer:

Given sides ratio =7:3:5

Let the sides be 7x, 3x and 5x respectively

Given Perimeter=300cm

perimeter=a+b+c

300=7x+3x+5x

300=15x

x=20 cm

A=7x=7(20)=140 cm

B=3x=3(20)=60 cm

C=5x=5(20)=100 cm

s=Perimeter/2=300/2=150 cm

Area=

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

=

$\sqrt{150(10)(90)(50)}$

=2598.07 cm²