Question

A ten year old boy is 125cm tall. If the present height of the boy is 78% of his full height,calculate the full height which the boy will eventually reach at the end of growth period .

Answer 1

Answer:

Maximum height (cm) =

present height(cm)/persent of full height at this age*100

$\frac{125}{78} \times 100$

160.26 cm will be his maximum height

Answer 2

Given:

• The present height of the boy = 125 cm
• The percentage of present height to body = 78%

To Find:

• The full height of the boy.

Solution:

Let "x" be the full height of the boy.

We can form an equation that says the present percentage of the height to the body of the full height is equal to the height of the ten-year-old boy.

(78/100)*x = 125 → {equation 1}

We rearranged the equation in terms of "x".

⇒ x = 125*(100/78) {dividing the terms in the bracket}

⇒ x = 125*1.2820 {multiplying the terms}

⇒ x = 160.25 cm

∴ The full height of the boy = 160.25 cm