Explanation:
1 m = 3.280839895... ft
therefore,
1 m² = 10.76391042... ft²
35 m² = 35 × 10.76391042... ft² =
= 376.7368646... ft²
the area of the circle is
pi×r²
r = 50/2 = 25 ft
so, the area of the red circle is
pi×25² = pi×625 = 1,963.495408... ft²
we need to paint it twice, so the area to be painted is twice the area of the circle
2×pi×625 = 3,926.990817... ft²
we need a many cans as the cover area of a single can fits into the total area to be painted :
3,926.990817... / 376.7368646... = 10.42369671... cans
we need to round this up to full cans.
so, we need 11 cans of red paint to give that red pad 2 coats of paint.