Question

Sides are 3x,5x , 7x and perimeter is 300cm . Find area

Answer 1

7x+3x+5x=300

15x=300

x=300/15

x=20

By herons formula

s=140+60+100÷2

s=300÷2

s=150

Area=√s(s-a)(s-b)(s-c)

Area=√150(150-140)(150-60)(150-100)

Area=√150x10x90x50

Area=√15x10x10x10x10x9x5

Area=100√3x5x3x5x3

Area=100x3x5√3

Area=1500√3 cm^2

Answer 2

Step-by-step explanation:

refer to the above answer ............