Building is 10 centimeters tall , actual building is 3 meters tall , what was the scale used?

1:30

Step-by-step explanation:

A building is 10cm tall.

Actual building is 3m tall.

1m = 100cm

3m = How many cm?

Cross multiplying gives:

3 × 100 = 300cm

The scale used here is:

10 cm represents 300cm

or

10:300

Simplifying gives a scale;

1:30

Meaning that 1cm represents 30cm of the actual building.

details

step-by-step explanation:

if the pizza is divided equally into 2 equal halves then you would get

πr^2/2

where r is the radius of the pizza.

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