three cube of side 20cm are joined end to end. find the surface area of the resulting figures
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When three cubes are joined together, the resulting cuboid’s length will change but the breadth and height will remain the same.
Thus, l = 20+20+20= 60 cm, b = 20 cm, h = 20 cm
We know that,
Surface Area of a Cuboid = 2(lb+bh+hl)
= 2(60*20 + 20*20 + 20*60)
= 2(1200 + 400 + 1200)
= 5600 cm^3
Answered by
0
answer is 3200
Step-by-step explanation:
when 3 cubes join cuboid is formed.
in this side of a cube =20cm
in cuboid
length= 20+20+20=60
breadth=20
height=20
surface area of a cuboid = 2h[l+b]
= 2*20[60+20]
=3200
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