algebra question

Question

someone growing at a rate of 3.5 cm per month. he is currently 90 cm at that rate in how many months will he grow to 132 cm?

Answer 1

Number of cm grown per month = 3.5cm 

Number of cm he has to grow = 132cm - 90cm = 42cm 

Number of months it will take to achieve this = 42/3.5 = 12 months = 1 year 

Therefore, it will take the person 1 year to grow to 132 cm.