Question

Edge length of a cube is 400 pm. Its body diagonal would be

• A. 566 pm
• B. 600 pm
• C. 500 pm
• D. 693 pm

Answer 1

Answer: (D)

693 pm

Answer 2

Length of the body diagonal $= a \sqrt{3}a$ is edge length $= 400 \times \sqrt{3} = 692.28 \,pm$ $= 693 \,pm$.