Question

If a right angled triangle of sides 5 cm, 12cm, 13 cm is rotated about its side of length 5cm and then about the side of length 12cm then find the difference between the curved surface area of the two different cones so formed ​

Answer 1

Answer:

❣ ANSWER ❣

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h = 12 cm

l = 13cm

r = 5 cm

$csa = \pi \times r \times l \\ = \frac{22 \times 5 \times 13}{7} \\ = 204.28 \: {cm}^{2}$

h = 5cm

l = 13 cm

r= 12 cm

$csa = \pi \times r \times l \\ = \frac{22 \times 13 \times 12}{7} \\ = 490.28 {cm}^{2}$

490.28 - 204.28

= 286 cm sq.

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