Paint cans

How many paint cans do we need to paint the floor in two rooms with dimensions of 6.8m x 4.5m and 6m x3.8m? One can arefor 6m².

Correct result:

n =  9

Solution:

a=6.8 m b=4.5 m  x=6 m y=3.8 m  S=a⋅ b+x⋅ y=6.8⋅ 4.5+6⋅ 3.8=2675=53.4 m2 S1=6 m2  n1=S/S1=53.4/6=8910=8.9 n=⌈n1⌉=⌈8.9⌉=9

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