Question

a large Ghirardelli bar is 30cm long and 12cm wide. a smaller Ghirardelli bar is 10cm long. If the bars are similar, what is the width of the smaller Ghirardelli's bar?

Answer 1

Explanation:

if the bars are similar, they are proportional.

make a proportion: length = 30 = 10

width 12 x

cross multiply: 12 times 10 = 120

divide by the number that ids left - 120 ÷ 30 = 4 cm

The width of the smaller bar is 4 cm.