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.
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