Question

if there are 5 peices of 6cm rod and 4 peices of 7cm rod that can be used .Using sum or all of them ,which length cannot be measured. A)30 B)29 C)31 D)33​

Answer 1

Correct option is C)

Let the length of middle piece = x

Then length of longest piece = 3x

Then length of shortest piece = 3x−46

Thus, x+3x+3x−46=80

⇒7x=126

⇒x=18

Hence, shortest piece = 18×3−46=54−46=8 cm

Answer 2

Answer:

c) 31 is the answer

Step-by-step explanation:

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