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
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Answered by
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.
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
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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