What is the surface area of the cube?
A. 64 mm2
B. 192 mm2
C. 384 mm2
D. 512 mm2

C. 384 mm2

Step-by-step explanation:

In order to find ONE side, you would multiply 8x8 (in this scenario at least).

You would then get this:

8mm x 8mm = 64mm2

But we're not done yet!

In order to find all six sides, you need to multiply the last number/area by six

You would then get:

64 x 6 sides = 384mm2

Hope this helps!

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true