Question

please please help me ​

Answer 1

Answer:

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Step-by-step explanation:

Given ,

radius=21cm

Height=3.5cm

To find, C.S.A of the mirror

Solution,

Now,

C.S.A=2×PI×R×H

=2×22/7×21×3.5

=462cm^2

Now,cost per cm^2=15 Rs

Therefore, total cost=462×15

=6930 Rs

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