Maths
posted by Ste .
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

Maths 
Reiny
surface area = 2 circles + 1 rectangle
= 2πr^2 + (2πr)(h)
= 2π(5^2) + 2π(5)(15)
= 50π + 150π = 200π cm^2
1 m^2 = 10000 cm^2
so our surface area = 200π/10000 m^2
cost = 4500(200π/10000) naira
= 90π naira
= .....
I will let you do the arithmetic
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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