10
A circular drop of oil has a diameter of 10 cm. If this
diameter decreases by 5% then by 10% and finally
by 15%, find the new circumference of the circle.
(Circumference of circle = 2 r )
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22.84 cm
Step-by-step explanation:
d = 10
new diameter
= 85/100 * 90/100*95/100 *10
= 17/20 * 9/10 * 19/20 * 10 = 7.2675
circumference= πD = 22/7 * 7.2675 =22.84cm
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