Question

One box is $30\text{cm}5\text{mm}$ tall. Another box is $20\text{cm}$ tall. How tall will the boxes be if both are placed one on top of the other?

• A. $55\text{cm}$
• B. $30\text{cm}5\text{mm}$
• C. $50\text{cm}5\text{mm}$
• D. $45\text{cm}$

Answer 1

The correct option is C $50\text{cm}5\text{mm}$

Given that,
Height of one box $=30\text{cm}5\text{mm}$
Height of another box $=20\text{cm}$
Hence, the total height when they are placed on top of each other $=30\text{cm}5\text{mm}+20\text{cm}$
$=(30+20)\text{cm}5\text{mm}$
$=50\text{cm}5\text{mm}$