Question

An oak tree grows at a rate of 3 3/5 inches per month. How much will the tree grow in 6 1/2 months?

Answer 1

The monthly rate is 3.6 inches per month.

So,

3.6 inches per months x 6.5 months = 23.4 inches

Answer 2

Answer: The tree grow by 23.4 inches.

Step-by-step explanation: Given that an oak tree grows at a rate of
`3(3)/(5)=(18)/(5)` inches per month.

We are to find the length by which the tree grow in
`6(1)/(2)=(13)/(2)` months.

We will be using the UNITARY method to solve the given problem.

In one month, the length of the tree grew is

`(18)/(5)~\textup{inch}.`

Therefore, in
`(13)/(2)` months, the length of the tree grew is given by

`(18)/(5)*(13)/(2)=(117)/(5)=23.4~\textup{inches}.`

Thus, the tree grow by 23.4 inches.