Maths
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
asked by
Ste

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 arithmeticposted by Reiny

maths
posted by STRONG
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