Question

the sides of a tri plot in ratio three five seven .peri 300m find area.​

Answer 1

suppose that sides in meters are 3x , 5x , 7x

then we know that 3x + 5x + 7x =300 { perimeter }

therefore 15 x is equal to 300 . which gives x equals to 20.

so sides of triangle are 3×20m , 5×20m,7×20m

i.e 60m ,100m , 140m

Herons Formulae..

60+100+140/2 m = 150m

area will be under root 150(150-60) (150-100) ( 150 - 140) m^2

i.e under root 150×90×50×10 m^2

Answer 1500 under root three m^2

Answer 2

Answer:

let its sides be

3x,5x,7x

300= 3x+5x+7x

15x=300

x=20

3x=60,5x=100,7x=140

area=√s(s-a)(s-b)(s-c),s=p/2

√150(150-60)(150-100)(150-140)

√150*90*50*10

√675000

=821.6