Question

Diameter of a bangle is 7 cm. Thin strips of gold is to be fixed on this bangle, find the cost for it at the rate of Rs.100 per 1cm.

Answer 1

Circumference=πd
D=7cm
=22×7/7
=22cm
Cost = 22×100
=2200/-

Answer 2

Given the diameter of a

bangle ( d ) = 7 cm

Length of Thin strips of the

gold fixed on the bangle =

Circumference of the circle

= πd

= ( 22/7 ) × 7 cm

= 22 cm

Now ,

Cost of the gold fixing 1cm = Rs100

Cost of fixing 22cm = 100 × 22

= Rs 2200

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