defence exam Indian Navy Chargeman/Draughtsman Mock Test 2023 Quantitative Aptitude Mensuration Solid Figures
The base of right pyramid is an equilateral triangle, each side of which is 20 cm. Each slant edge is 30 cm. The vertical height (in cm) of the pyramid is:
1
\(10\sqrt 3 \)
2
\(5\sqrt {\frac{{23}}{3}} \)
3
\(5\sqrt 3 \)
4
\(10\sqrt {\frac{{23}}{3}} \)