Question

the Length breadth and height of a cuboid are in the ratio of 5 ratio 4 ratio 1 if the volume of cuboid is 540 cm cube find the surface area of of cube​

Answer 1

5p*4p*p=540

20p³=540

p³=27

p=3

Answer 2

given ratio of l:b:h=5:4:1

let it be 5x,4x,1x

volume of cuboid= lbh

                =5x * 4x * 1x

                = 20 x ^3

    540 = 20 x^3

     27 = x^3

      3=x

l=15

b=12

h=3

surface area = 2(lb + bh+ lh)

= 2( 15*12 + 12*3 + 15*3)

=2(180 + 36 + 45)

=2(261)

= 522 SQ CM