Roof repair

We need 15 pieces of boards 6 m long, 15 cm wide, and 25 mm thick to repair the roof. How many euros will we pay for all boards if 1 m3 of boards costs 500 euros?

Correct answer:

x =  168.75 Eur

Step-by-step explanation:

n=15 a=6 m b=15 cm m=15:100  m=0.15 m c=25 mm m=25:1000  m=0.025 m  p=500 Eur/m3  V1=a b c=6 0.15 0.025=4009=0.0225 m3 V=n V1=15 0.0225=8027=0.3375 m3  x=p V=500 0.3375=168.75 Eur

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