Math, asked by Ketanjiwane2529, 1 year ago

The surface area of a cuboid is 1792cm2. If its length, breadth and height are in the ratio 4:2:1 , find the length of the cuboid

Answers

Answered by αηκυsн
5
let l=4x,b=2x,h=x
2(4x.2x)+2(2x+x)+2(4x+x)
12x+6x+10x=1792
28x=1792
x=50176c.m.

Jhalak678: TSA of a cuboid = 2(lb+bh+hl)
Answered by maimounapasha5463
2

Answer:

32 cm

Step-by-step explanation:

let l=4x

    b=2x

    h=1x

TSA of cuboid= 2(lb+bh+hl)= 1792 cm^2

                         2(4x*2x+2x*1x+1x*4x)= 1792 cm^2

                         2(8x^2+2x^2+4x^2)= 1792 cm^2

                         2*14x^2= 1792 cm^2

                         14x^2= 1792

                                      2

                         14x^2= 896 cm

                         x^2= 896

                                   14

                        x^2= 64

                        x= root of 64

                          = 8

therefor, length= 4x

                          =4*8

                          = 32 cm

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