Question

A single board is 1/12 meter thick. How many boards are there in a stack of boards that is 2 meters high?

Answer 1

Let the number of boards be n.

Since each of them is

`(1)/(12)`
meter thick,

All the n boards will be,


`(1)/(12) * n`
meters thick or high.

Since all the board is 2 meters high, it means,


`(1)/(12) n = 2`
Multiplying through by 12,

n = 2×12

n = 24.

There are 24 boards in the stack.

Alternatively,

Since each board is

`(1)/(12)`
meters thick, the number of boards that will be 2 meters high is ;


`(2)/( (1)/(12) )`
This is

`= 2 * (12)/(1)`

`= 24`