1.

What is the central angle of the sector to be used to make a cone of base radius 10 centimetres and slant height 25 centimetres?

Answer»

Central anglejof the sector

(x) = \(\frac{r}{l}\times360\),

r = 10 cm, l = 25 cm

\(\frac{10}{25}\times360\)

= 144°



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