math
posted by ore
a closed tin is in the shape of acylinder of diameter 10cm and height 15cm.use the value 3.14 for pie to find a)the total surface area of the tin b)the value of the tin to the nearest naira if tin plate cost 450 per m2

Steve
pi, not pie!
2pi(r^2+rh) = 2pi(25+75) = 200pi
Now just multiply that are by the cost, which is .0450/cm^2 
Nwokeji Esther
2*3.14*5 (5 plus 15)
31.4 (20)
628cm^20th total surface area
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A closed tin is in the shape of a cylinder of diameter 10cm and height 15cm. Use the value 3.14 for pier to find A.the total surface area B.the value of the tin to the r=nearest 10naira,if tin plate cost #4500 per m2