Question

h=5cmand r=3.5/2cm find the area the ans =39.6cm sq (approx)​

Answer 1

the given height of cone =5-3.5/2=3.25

and radius = 3.5/2=1.75

l = root h^2+r^2

l= root 3.25^2+1.75^2

l=3.69 cm

area of figure = curve surface area of cone + curve surface area of hemispheres

=

$\pi \times rl + 2\pi \times {r}^{2} \\ \pi \times r(l + 2r) \\ \frac{22}{7} \times 1.75(3.69 + 2 \times 1.75) \\ \frac{22}{7} \times 1.75 \times 7.19 \\ \frac{276.81}{7} answer$

276.81/7

39.54 answer