+0  
 
0
83
1
avatar

The total length of pencils A, B and C is 29 cm. Pencil A is 11 cm shorter than pencil B, and pencil B is twice as long as pencil C. How long is pencil A?

 Jan 15, 2020
 #1
avatar+109739 
+1

Let B   = L

Let A = L - 11

Let C  = (1/2)B    = (1/2)L  = .5L

 

So we have that

 

A + B + C   =  29

 

(L -11) + L + (.5)L  = 29         simplify

 

2.5L -  11  = 29             add 11 to both sides

 

2.5L =  40                     divide both sides by 2.5

 

L  = 16

 

A =  L - 11  =   16  - 11   =    5 cm

 

 

cool cool cool

 Jan 15, 2020

17 Online Users

avatar
avatar