question 14 please do it
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Step-by-step explanation:
Volume of a cube = a^3 (where a is the side of the cube)
so a^3= 512
a= (512)^1/3
a=8 cm
now 2 such cubes are there so the length of the cuboid is a+a = 2a= 16 cm
breadth = a and height = a
surface area of a cuboid = 2(l*b+b*h+h*l)
= 2(16*8+8*8+8*16)
=2(128+64+128)
=2(320)
= 640cm^2
Answered by
0
Answer:
640cm^2
Step-by-step explanation:
side of cube =a^3
512=a^3
a= 8cm
when we join two cube so the resulting Cuboid sides are
length=8+8=16cm
breadth=8cm
height=8cm
surface area of cuboid is =2(lb+bh + hl)
=2(16×8+8×8+8×16)
=2(128+64+128)
=2×320
= 640cm^2
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