Q9 of 52 Page 117

Weight of Savan babu is 80kg. In order to reduces his weight, he started regular morning walk. He decided to reduce his weight every year by 10%. Let us write by calculating, his weight after 3 years.

We know that after reduction, the weight after n years


Where p = present weight, r% = rate of decrease in a year and n = number of years.


Given p = 80 kg, r% = 10% and n = 3 years


⇒ Weight after 3 years



= 58.32 kg


∴ Savan Babu’s weight after 3 years is 58.32 kg.


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