Question

A small rectangle has a width of 5cm and a length of 7cm. using the same ratio, what will be the length of a bigger rectangle it its width is 90cm?​

Answer 1

We can use rule of tree in this problem as we get to know that we are using the same ratio, so:

We know that for a width of 5 cm we have a length of 7 cm,


Length Width

5 cm ————> 7cm

90 cm ————> x


We multiply in X this data:

5x = 90 * 7

x = 630/5

x = 126 cm

So with all of this we found out that the length of the rectangle with a width of 90 cm is 126 cm.