Please help. It's a question on Khan Academy. DON'T SPAM. Juana is measuring two pyramids whose bases are isosceles right triangles.

Given the height hhh and the volume VVV of the first pyramid, Juana uses the formula

a=\sqrt{\dfrac{6V}{h}}a=

h

6V

​

​

a, equals, square root of, start fraction, 6, V, divided by, h, end fraction, end square root

to compute its base's side length aaa to be 111 meter.

The second pyramid has the same height, but has 999 times the volume. What is the side length of its base?

Choose 1

Choose 1

(Choice A)

A

\sqrt6

6

​

square root of, 6, end square root meters

(Choice B)

B

333 meters

(Choice C)

C

3\cdot\sqrt63⋅

6

​

3, dot, square root of, 6, end square root meters

(Choice D)

D

999 meters