Painting classrooms

Martha solicited 3 2/3 liters of paint for the brigade. Their city mayor gave their school another 2 2/5 liters of paint. How many classrooms can be painted if each classroom needs 1 3/7 liters?

Correct answer:

n =  4

Step-by-step explanation:

M=332=3+32=33 3+2=39+2=311=3323.6667 l A=252=2+52=52 5+2=510+2=512=252=2.4 l  c=173=1+73=71 7+3=77+3=710=1731.4286 l  V=M+A=311+512=1555+1536=1555+36=1591=61516.0667 l  n1=V/c=1591/710=1591:710=1591 107=15 1091 7=1506374.2467  n=n1=4.2467=4



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