Question

a right angled triangle with its height and base 4cm and 3 cm respectively,is rotated about its height. find the lateral surface area of the surface thus generated
a,45.25cm2
b.48.14 cm2
c,47.14cm2
d.46.89cm2

Answer 1

Answer:

b 48.14cm2 is the lateral surface area generated

hope it helps

Answer 2

Answer:

(c) option is correct.

Step-by-step explanation:

as the triangle is rotated about its height .so ,

h=4cm

r=3cm

l=5cm

lateral surface area of the cone so obtained is =pi.r.l

=3.14.3.5

=3.14.15

=47.10cm^2=47.14cm^2(aprox)