Question

perpendicular+height+of+a+cone+is+12+centimetre+and+its+slant+height+is+13+cm+find+the+radius+of+the+circular base+of+the+cone

Answer 1

radius =

$\sqrt{ {13}^{2} - {12}^{2} }$

r =

$\sqrt{169 - 144}$

r =

$\sqrt{25}$

r=5

Answer 2

Let h be height and l be the slant height

h = 12 cm l = 13 cm

We know that

r = √(l² - r²)

= √(13² - 12²)

= √25

= 5 cm

Therefore radius = 5 cm