Solid geometry question?

Question

Answer 1

The cross sectional area of the hexagon is 1500√3 cm^3 / 10cm = 150√3 cm^2

The formula for the area of a hexagon is (3s^2√3) /2, where s is the length of one side.

(3s^2√3) /2 = 150√3 cm^2

(3s^2) /2 = 150 cm^2

3s^2 = 300 cm^2

s^2 = 100 cm^2

s = 10 cm

So the area of each of the six equal sides is 10 cm x 10 cm = 100 cm^2

The area of all six sides is 600 cm^2.

So the total area is 600 cm^2 + 2 (150√3 cm^2) = 1119.61524 cm^2

So answer d.