Question

please help me please please answer these both​

Answer 1

Answer:

in which standard you are

Answer 2

Step-by-step explanation:

Answer:-

Let the sides be

3x ; 5x ; 7x ;

3x + 5x + 7x = 300m

15x = 300

x = 300/15

x = 20cm

I) 3x => 3 x 20 => 60

ii ) 5x => 5 x 20 => 100

iii) 7x => 7 x 20 => 140

Area:-√s(s - a)( s - b ) (s - c)

Area = √150(150-60)(150-100)(150-140)

Area = √150 x 90 x 50 x 10

Area = √15 x 15 x√ 3 x √10^4

Area = √15^2 x √3 x √10^4

Area = √15 x √3 x √10^2

Area = √15 x √3 x 100

Area = 15√300