Answer: The length of pencil is 16 centimetres and length of crayons is 8 centimetres
Step-by-step explanation:
Let the length of crayon =[tex]x[/tex]
Length of a pencil =[tex]2x[/tex]
As according to question that the sum of their length is 24 centimetres
So we have
[tex]x+2x=24\\\\\Rightarrow 3x= 24 \\\\\Rightarrow x= \dfrac{24}{3} =8[/tex]
Therefore the length of crayon = 8 centimetres
Length of pencil= [tex]2x= 2\times x = 2\times 8 =16[/tex] centimetres
Hence, the length of pencil is 16 centimetres and length of crayons is 8 centimetres