A model ship is built to a scale of 1 cm: 5 m. The length of the model is 30 cm. What is the length of the actual ship?

a.

150 m

c.

30 m

b.

5 m

d.

15 m

1cm : 5 m

convert 1 cm to m. Therefore:

0.1 m: 5m

and the length of the model is 30cm which is 0.3 m

so:

0.1: 5

0.3: X

Now, cross multiply

0.1 multiplied by x and 0.3 multiplied by 5

0.1x : 1.5

(divide by o. 1 to get x)

0.1x/o. 1 : 1.5/0.1

x = 15 m so d is the answer