ow much tin is required to make one baked bean can, if the height of the can is 21 centimeters and its radius is 12 centimeters? (Use 3.14 for .)

Answer 1

a tin can is a hollow cylinder so the surface area of the cylinder should be taken into account. the formula for the surface area of a cylinder is 2pi x r^2+2pi x rh and then insert the given numbers. 2pi(12)^2+2pi(12)(21) which is equal to 2pi(144)+2pi(252)=792pi

Answer 2

the entire surface area of a can is total area of top and bottom cap and body.

Total area = 2 * ( PI * r^2) + 2*PI*r*height

= 2*(3.14 * 12^2) + 2*3.14*12*21

Answer 3

base: 12²π cm²

top: 12²π cm²

side (24)(π)(21) cm²