Question

Cody was 165 cm tall in the first day of school this year, which was 10% taller than he was on the first day of school last year. How tall was Cody on the first day of school last year?

Answer 1

Cody height this year=165
10percent of 165=10/100*165=16.5
Hence last years height = 165-16.5
= 148.5cm
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Answer 2

The height of Cody on the first day of school last year was 150 cm.

Step-by-step explanation:

Consider the provided information.

Cody was 165 cm tall in the first day of school this year, which was 10% taller than he was on the first day of school last year.

Let the height of Cody on the first day of school last year is x.

According to question.

x + 10% of x = 165

$x + 10\% \times x = 165$

$x (1+ 10\%) = 165$

$x (1+ \frac{10}{100}) = 165$

$x (1+0.1) = 165$

$1.1x= 165$

$x=150$

Hence, the height of Cody on the first day of school last year was 150 cm.

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