Question

The mean length of $6$ rods is $44.2cm$. The mean length of $5$ of them is $46cm$. How long is the sixth rod?

Answer 1

The mean length of $6$ rods is $44.2$$cm$
The mean length of $5$ rods is $46$ cm

The total length of $6$ rods is $=44.2\times 6=265.2$ cm

The total length of $5$ rods is $=46\times 5=230$ cm

The length of the $6$th rod is $=$ [Total length of $6$ rods] $-$ [Total length of $5$ rods]

The length of the $6$th rod is $=265.2-230=35.2$ cm.