The volume of a cylinder is given by the formula;
Volume = πr²h, where r is the radius, and h is the height or the length
Therefore,
252 π cm³ = π r² (7)
r² = 252/7
= 36
r = √36
= 6 cm .
Hence, the radius of the cylinder is 6 cm
-2(5y-20) - 5y = -5
-10y + 40 - 5y = -5
-15y + 40 = -5
-15y = -45, y = 3
x = 5(3) - 20
x = 15 - 20, x = -5
Solution: x = -5, y = 3... or (-5,3)
