Question

Use the scale factor 1:12 to find the missing dimension. Great white shark actually lengthy 21ft

Answer 1

The missing dimension using a scale factor of 1 : 12 is 1.75ft

How to determine the missing dimension

From the question, we have the following parameters that can be used in our computation:

Scale factor = 1 : 12

Also, we have

Actual length = 21 ft

Using the above as a guide, we have the following:

Missing dimension : 21 ft =1 : 12

So, we have

Missing dimension/21 ft = 1/12

Rewrite as

Missing dimension = 1/12 * 21ft

Evaluate

Missing dimension = 1.75ft

Hence, the missing dimension is 1.75ft

Answer 2

m = 21 inches

The model length is 21 inches

Question;

Use the scale factor 1:12 to find the missing dimension. Great white shark actually lengthy 21ft. Find the model length in inches.

Explanation:

Given;

Scale factor = 1:12

Actual length a = 21 ft

Let m represent the model length;

The ratio of model length to actually length is given as;

m/a = 1/12

m = a/12

Substituting a=21 ft;

m = 21/12 ft

Converting to inches;

1 ft = 12 inches

So,

m = 21/12 ft × 12 inches/ft

m = 21 inches

The model length is 21 inches