The surface area of cube is 864 cm square.Find its volume and its diagonal
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Answer:
surface area=6a^2
864/6=a^2
144=a^2
a=12
volume=a^3
12^3=1728
each side=12
by pythagoras theorem
12^2+12^2=diagonal^2
144+144=d^2
288=d^2
d=root of 288
Step-by-step explanation:
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TSA of cube = 6 a^2=864
A^2= 144
A=12cm
Diagonal = root 3a
= underoot 3 *12
=20.784
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