A CONE HAS A BASE RADIUS OF 5CM AND HEIGHT OF 12 CM.CALCULATE ITS SLANT HEIGHT.

2 answers

I NEED CALCULATION
Draw a side view. It should be clear that the slant height s is
√(5^2 + 12^2) = 13

You can save yourself a lot of calculation if you just memorize a few of the basic Pythagorean triples, such as
3-4-5, 5-12-13, 8-15-17, 7-24-25
and their multiples