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Red and grey bricks were used to build a decorative wall.

The number of red bricks

----------------------------------   was 5/2. There were 210 bricks used in all. How many red bricks were used?

the number of grey bricks 

 Mar 5, 2018
 #1
avatar+99592 
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5 : 2    means that there are  5 + 2  =  7 equal parts

 

And  the red bricks  are   5/7  of the total....so.....

 

(5/7) 210  =

 

5 (210 / 7)  =

 

5 (30)  =

 

150   red bricks

 

And

 

The grey bricks  are 2/7  of the total  =

 

(2/7) (210)  =

 

2 ( 210 / 7)  =

 

2 (30)  =

 

60  grey bricks

 

 

cool cool cool

 Mar 5, 2018

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