41. A girl's height increased by 20% last year and 10% this year. What

1.	41. A girl's height increased by 20% last year and 10% this year. What is the total percentage increase inher height in 2 years?
Answer» let the height of girl be x now , after 2 years , the height of girl will be x+20%of x = 1.2x and again after 1 year , the height of girl is 1.2x + 10%of(1.2x) = 1.32x now, actually increase in height over two years is. = (1.32-1)x/x *(100%) = 32%

41. A girl's height increased by 20% last year and 10% this year. What is the total percentage increase inher height in 2 years?

Answer»

let the height of girl be x

now , after 2 years , the height of girl will be x+20%of x = 1.2x

and again after 1 year , the height of girl is 1.2x + 10%of(1.2x) = 1.32x

now, actually increase in height over two years is. = (1.32-1)x/x *(100%) = 32%