22A closed tin is in the shape of a cylinder of diameter 10cm and height 15cm use the value 3.14 for pie to find:the total surface area of the tin.b,the value of the tin to the nearest 10,if tin plate costs 4500 per m2.

Answer 1

That's pi not pie!
The area consists of two circles and a rectangle
A = 2πr^2 + 2πrh
So plug in your numbers. To find the value, multiply the area by the cost per cm^2
Note that 4500/m^2 * (1m/100cm)^2 = 4500/10000 = 0.45/cm^2