Four pavers

Four pavers would pave the square in 18 days. How many pavers do you need to add to done work in 12 days?

Correct result:

n =  2

Solution:


4•18 = 12•(4+n)

12n = 24

n = 2

Our simple equation calculator calculates it.



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Showing 3 comments:
#
Idk
the answer should be 6,

the total "power" (as I like to call it) is 4 x 18, which is 72.
You divide that by 12, giving you six.

The calculator is wrong. Six pavers are needed.

#
Dr Math
Six pavers are needed, but we need to add only 6-4=2 pavers

#
User
Re @idk

4 * 18 = 12(4+n)
72 = 12(4+n)
-----------------
       12
6 -4 =4 - 4+n
6 - 4 = n
2 = n

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