Question

Marguerite is building a box. She needs 78 pieces of wood that are 29 cm long. The wood comes in boards that are 6 meters long. How many boards will she need

Answer 1

First, we are going to multiply the pieces of wood by the length of each piece to find the total length she will need:
$78*29cm=2262cm$

Next, we are going to convert 2262 centimeters to meters. To do that we are going to take advantage of the fact that 1 m=100cm:
$2262cm* \frac{1m}{100cm} =22.62m$

Now, we just need to divide the total length of wood Marguerite needs by the length of each board of wood:
$\frac{22.62m}{6m} =3.77$
Since she will need full boards of wood, we must round 3.77 to its nearest integer 4.

We can conclude that Marguerite will need 4 boards of wood.