Amodel 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