Question 31680
THE 3.8CM IS THE RADIUS OF THE TOP CIRCLE OF THE CAN THE 6CM IS THE HEIGHT OF THE CAN.

YOU NEED TO FIND THE AREA OF THE TOP OF THE CAN WHICH IS 3.14*(3.8)~2 OR
3.14*14.44 OR 45.34 SQ CM. THE CIRCUMFERENCE OR THE TOP IS 3.14*2*3.8 OR
23.864 CM. 
MULTIPLYING THE CIRCUMFERENCE OF THE TOP AND THE HEIGHT GIVES 
23.864*6=143.184 CM~2. THIS PLUS 2 TIMES THE AREA OF THE TOP OR 2*45.34 OR
90.68 THUS THE TOTAL SURFACE IS 90.68+143.184 OR 233.864 CM~2.
THE VOLUME OF THE CAN IS THE TOP AREA TIMES THE HEIGHT OR
45.34*6=272.04 CUBIC CM.
RATIO OF SURFACE (233.864) TO VOLUME (272.04) IS 233.864/272.04 OR .8596676