Question

the length breadth and heights are in the ratio of 7:4:3 if the TSA of is 5978cm^2​

Answer 1

Step-by-step explanation:

let the length be 7x cm,breadth be 4x cm,height be 3x cm

As we know TSA= 2lb+2 bh+2hl

or, 5978= 2×7x×4x+2×4x×3x+2×3x×7x

or, 5978= 56x^2+24x^2+42x^2

or, 5978=122x^2

or , 5978÷122=x^2

or, 49=x^2

or, x=√49

or, x=7

Now, length= 7x=7×7=49cm

breadth=4x=4×7=28cm

height =3x=3×7=21cm