X. A circular flower bed has a diameter of 3 m.
A metal boundary costing 25 per m, is to
be placed around it.
a) Find the length of the metal boundary.
b) How much would this boundary cost?
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Answer:
diameter =3 m
radius=3/2 m
lwngth of the metal boundary
=2.π.3/2 m
=2.22.3/7.2 m
=66/7 m
=9 3/7 m
b) boundary cost = Rs 66/7×25
= Rs 1650/7
=Rs 235.71
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