Find the volume of a cone which has a base radius of 5 cm...
Find the volume of a cone which has a base radius of 5 cm and slant height of 13 cm.
300π cm3
325π cm3
3253π cm3
100π cm3
Correct answer is D
Volume of a cone = 13πr2h
r = 5 cm
l = 13 cm
Using Pythagoras theorem
⇒ 132=52+h2
⇒ 169=25+h2
⇒ 169−25=h2
⇒ h2=144
⇒ h=√144=12cm
∴ Volume of the cone = 13×π×52x12=100π cm3
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