The length 6

The length of 12 pipes is 10 1/2 meters.
(1) find the length of one pipe
(2) also find the length of 7 pipes

Correct answer:

a =  0.875 m
b =  6.125 m

Step-by-step explanation:

n=12 d=1012=10+12=10 2+12=212=10.5 m  a=d/n=10.5/12=78 m=0.875 m
b=7 a=7 0.875=498 m=6.125 m

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