Question

7. Ajoker's cap is in the form of a right circular cone of base radius 7 cm and height
24 cm. Find the area of the sheet required to make 10 such caps.​

Answer 1

Answer:

the formula of t.s.a is pi ×r(l+r)

we are using t.s.a because we should find area of sheet which is used to cover the cap

so,

pi×7(24+7)

22÷7×7(31)

22×31=682m.sq

for one cap 682 m.sq for 10 caps

682×10=6820

therefore the cloth area used to cover the 10 caps is

6820m.sq

Answer 2

Answer:

CSA of Rt circular cone:

r = 7cm, h=24

I=v7^2+24^2

=v49+576=v625=25cm

CSA= πrl=22x7x25/7=550cm2

Area of 10 caps=5500cm2