Question

right angle triangle with sides 3cm 4cm and 5.0 cm is rotated about the side 4.0 cm find volume and curved surface area of case so formed

Answer 1

Answer:

9cm = 5 cm is rotate 16 cm

Answer 2

Answer: Pls mark as brainliest!!!!

Step-by-step explanation:

The triangle is rotated about the base (4 cm) so the radius becomes 4cm.

Volume= $1/3*\pi *r^{2} *h$

Height= 3cm

= 1/3 * 22/7 * 4*4 * 3

=22/7 * 16

=50.24$cm^{3}$

CSA= $\pi *r*l$

$l = \sqrt{h^{2} +r^{2} }$

$\sqrt{16+9}$

=5 cm

Therefore, 22/7 * 4 * 5

22/7 * 20

=62.8 $cm^{2}$