Question

a semi circular sheet of paper of diameter 14cm is bent to form a conical cup find the radius and slant height of cup​

Answer 1

Answer:

311.08 cm cube

Step-by-step explanation:

r=14/2=7cm

area of semi circle = CSA of cone

1/2πr^2=πrl

πr(1/2r)=πr(l)

1/2r=l

1/2×7=l

l=3.5

by pythagores theorem

h^2=p^2+b^2

p^2=h-^2-b^2

h^2=(3.5)^2-(7)^2

h=√-12.25+49

h=√36.75

h=6.06cm

volume =1/3πr^2h

1/3×22/7×7×7×6.06

=311.08cm³