Question

A boy is 11- years old and has 80%of his full height. He is 120cm tall. Calculate his full height at the end of his growth period. ​

Answer 1

We should ignore the fact that he is 11 years old, to use this information will make us deal with the question incorrectly.

We can do a cross product.

80 100 ?

120

(120*100)/80 = 150cm

The final height of the boy will be 150cm.

Answer 2

Answer:

150 cm

Explanation:

Let the full height be = x

ATQ,

80% of x = 120

$\frac{80}{100} \times x = 120 \\ x \: = \frac{120 \times 5}{4} = 150 \:cm$