Question

the length breadth and height of a cuboid are in the ratio 7"6:5. if the surface area of the cuboid is 1926cm2

Answer 1

SA=2 (lb+bh+hl)
1926=2 (7x*6x+6x*5x+5x*7x)
1926=2 (42x^2+30x^2+35x^2)
1926=2*107x^2
1926=214x^2
1926÷214=x^2
9=x^2
3=x