Metal rails

Dad needs to improve the edges of the wooden boxes - to be reinforced with metal rails. How many cms of rails will he need if the box has the shape of a prism with the length of the edges 70cm, 70cm, and 120cm?

Correct answer:

x =  1040 cm

Step-by-step explanation:

a=70 cm b=70 cm c=120 cm  o=2 (a+b)=2 (70+70)=280 cm  x=2 o+4 c=2 280+4 120=1040=1040 cm x1=4 (a+b+c)=4 (70+70+120)=1040 cm x1=x

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