<https://www.amansmathsblogs.com/ssc-chsl-mensuration-3d-questions-answers-set-4/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.amansmathsblogs.com/ssc-chsl-mensuration-3d-questions-answers-set-4/>