Q7. whole and question 9. whole
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ques.7 c) part
dimensions of cuboid
l=100cm
b=80cm
h=64cm
Since this cuboid is melted and recast into a cube, therefore
volume of cuboid = volume of cube
lbh. = a^3
(100)(80)(64) =a^3
8000(64) = a^3
512000=a^3
a = 80 cm
therefore edge of the cube is 80cm
now we know that surface area of cube is 6a^2
now 6(80)^2
6(6400)
=38400cm^2
Hope this answer will help you
dimensions of cuboid
l=100cm
b=80cm
h=64cm
Since this cuboid is melted and recast into a cube, therefore
volume of cuboid = volume of cube
lbh. = a^3
(100)(80)(64) =a^3
8000(64) = a^3
512000=a^3
a = 80 cm
therefore edge of the cube is 80cm
now we know that surface area of cube is 6a^2
now 6(80)^2
6(6400)
=38400cm^2
Hope this answer will help you
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