Question

11. The radius of a circular brass plate is 20 cm.
Find the cost of polishing the top surface of
12 such plates at the rate of 450 per sq. m.
(Take it = 3.14)​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

RS 1695600

Step-by-step explanation:

AREA OF CIRCLE=PIE R^2

                                  =3.14*10*10

                                   =314 CM^2

AREA OF 12 SUCH PLATES=314*12

                                             =3768 M^2

COST PER SQ. M=RS 450

COST 3768 SQ.M= RS 1695600

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