$\"\"$

Find ratios between the corresponding parts of the pyramids.

Find ratios of heights:

$\"\"$

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Simplify)

The scale factor is 4 : 3. $\"\"$

If the scale factor is a : b, then the ratio of the surface areas is $\"\"$ : $\"\"$ .

Find ratios of Surface areas:

$\"\"$

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Evaluate powers) $\"\"$

The ratio of the surface areas is 16 : 9.