Quantitative Aptitude – Geometry – Pyramid


Slot – 2 – Quantitative Aptitude – Geometry – Pyramid – The base of a regular pyramid is a square

Q. The base of a regular pyramid is a square and each of the other four sides is an equilateral triangle, length of each side being 20 cm. The vertical height of the pyramid, in cm, is?
  1. 8√3
  2. 10√2
  3. 12
  4. 5√5
Answer: 10√2

Solution: As we know that the square pyramid of edge length a has height
h=1/2 sqrt(2)* a,
So, h = ½ * root 2* 20 = 10 root 2

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