Assuming the tin has a base but no top, the surface area is (pi)r^2 (base) + 2(pi)rh, where r=radius=(1/2)10cm=5cm and h=height=15cm. The total surface area is (pi)r(r+2h)=5(pi)(5+30)=175(pi)sq cm. 1cm=0.01m, so 1sq cm=0.0001 sq m. 175(pi)sq cm=0.0175(pi)sq m. The value of the tin is $450*0.0175(pi)=$24.74.