There are 250 bricks used to build a wall that is 20 feet high. How many bricks will be used to build a wall that is 30 feet high?
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1
Answer:
375 bricks
Step-by-step explanation:
This can be regarded as being a direct comparison between two different quantities, It is an example of DIRECT PROPORTION because if the number of bricks increases, the height of the wall increases.
If the wall is to be 30 feet, more bricks will be needed.
250
20
=
x
30
20
x
=
250
×
30
x
=
250
×
30
20
x
=
375
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