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Examples 16 to 22
(16) (i) If the diameter of a circle increases by 30%, its circumference will increase by how many percentage ?
(ii) In above example area of the circle will increase by how many percent ?
Soln.
Examples 11 to 15
(11) The value of a machine depreciates at the rate of 10 % per annum. If its present value is Rs. 8100, what will be its worth after 2 years ? What was the value of the machine 2 years ago ?
Soln.
Value of the machine a…