Respuesta :
Add the 3 ratio portions together: 1 + 4 + 7 = 12
Divide total length by 12:
84/12 = 7
Multiply each ratio portion by 7:
1 x 7 = 7
4 x 7 = 28
7 x 7 = 49
The longest piece is 49 cm
Answer:
49cm
Step-by-step explanation:
1x+4x+7x=84
12x=84
X=7
4*7=28
7*7=49
So we can see 49cm is the longest.