Question

. Find the height of the figure below if the surface area is 119.38 mm2.

Answer 1

is 4 mm its diameter or radius?

Answer 2

i'm guessing radius?

Answer 3

applying the formula of surface area of a circle with radius r, area= pi*r^2
in this case, there are 2 circular surfaces, each with radius 2mm
then the surface area of two circles=8*pi=25.13 mm^2
then the lateral surface area=119.38-25.13 mm^2=94.25 mm^2
the circumference of the circular surface=2*pi*r=12.56 mm
so, the height= 94.25/12.56 mm=7.5 mm

Answer 4

i think that's diameter ^^

Answer 5

kay thanks

Answer 6

welcome