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abhishek

· started a discussion

· 1 Months ago

Solution (Question: 351288.0 )

Please provide complete solutio .otherwise no use of test

Question:

Find the area of the shaded region, where radii of the two concentric circles with centre O are 7 cm and 14 cm respectively and ∠AOC = 40º (Take  π=227   ).

  

Options:
A)

410.67cm2

B)

410.32 cm2

C)

408.67 cm2

D)

401.32 cm2

Solution:

Ans: (a)


Knowledge Expert

· commented

· 1 Months ago

Dear Student,

we already fixed it's solution. please read it.
Here we use formula for calculate area of sector = pai r^2 theta/(360 degree) here teta = given angle shaded region apart from the area of sector thus we find their angle subtract 40 degree from 360. \
and find the area of sector for radius= 7 cm and 14 cm. see in the solution. finally subtract both sector areas we get area of shaded part.

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