Question : If the length of the diagonal of a cube is $7 \sqrt{3} \mathrm{~cm}$, then the surface area of the cube is_____.
Option 1: 216 cm2
Option 2: 256 cm2
Option 3: 284 cm2
Option 4: 294 cm2
Correct Answer: 294 cm 2
Solution :
We know that the diagonal of a cube = a$\sqrt3$
According to the question,
a$\sqrt3$ = 7$\sqrt{3}$
⇒ a = 7
Now, the Surface area of the cube = 6a
2
= 6(7)
2
= 294 cm
2
Hence, the correct answer is 294 cm
2
.
Related Questions
Know More about
Staff Selection Commission Combined Grad ...
Result | Eligibility | Application | Selection Process | Preparation Tips | Admit Card | Answer Key
Get Updates Brochure
Your Staff Selection Commission Combined Graduate Level Exam brochure has been successfully mailed to your registered email id “”.
Upcoming Exams
Trending Articles around SSC CGL
