Math, asked by rohandhamija1055, 10 months ago

What is the cross sectional area of a circular ring of D = 38mm D = 32mm

Answers

Answered by rashich1219
2

Given:

A circular ring of D = 38mm D = 32mm.

To Find:

What is the cross sectional area of a circular ring of D = 38mm D = 32mm?

Solution:

here, it is given :-

A circular ring of D = 38mm D = 32mm.

therefore, R = 19mm and r = 16mm

so, according to question,

Area of the circular ring is given by-

A=\pi(R+r)(R-r)\\\\A=\pi(19+16)(19-16)\\\\=\pi(35)(3)\\=105\pi \ mm^2\\or\\=1.05\pi \times 10^{-4} \ m^2

Answered by pain46
0

Answer:

D = 38, R = 19

d = 32 , r = 16

πr² - πr²

(22/7*19*19) - (22/7*16*16)

1134.11 - 804.24

330sq.mm

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