Question

Find the value of cone, it its total surface is
7128 sqcm and radius of base is 28cm. (
$\pi$
22).
7​

Answer 1

Answer:

Step-by-step explanation

T.S.A.Cone= 7128

πr(l+r)=7128

22/7×28(l+28)=7128

88(l+28)=7128

88l + 2464=7128

88l=7128-2464

l=4604/88

l= 53

Now, to fine high 'h'=√l2-r2

√(53)2-(28)2

√2809-784

√2025

h=45

Volume of cone= 1/3πr2h

1/3×22/7×(28)2×45

1/3×22×112×45

22×112×15

36960