Question

walt grew 10 centimeters in 1 year.He is now 1.6 m tall.How tall was he, 1 year ago

Answer 1

he was 1.5 m tall last year.
1.6m-10cm
=160cm-10cm
=150 cm
=1.5 m

Answer 2

Let his height be x m = 100x cm
Then after 1 year his height will be 100x + 10 cm
given that his height after 1 year = 1.6 m = 160 cm
⇒ 100x+10 = 160
⇒ 100x = 160 -10
⇒ 100x = 150
⇒ x = 150/100
∴ x = 1.5
∴ His height = 1.5