The rectangular hall will have to pave with square tiles with a side length of 15 cm. The hall has a length of 18 meters and a width of 3 m. How many tiles need to buy if 2 percent of the amount is disrupted during the work?

Correct answer:

n =  2448

Step-by-step explanation:

a=15 cm m=15:100  m=0.15 m  x=18 m y=3 m  n1=x/a=18/0.15=120 n2=y/a=3/0.15=20  S1=n1 n2=120 20=2400  q=100%+2%=1+1002=1.02  n=q S1=1.02 2400=2448

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