The Sum of the radius of the base and the height of a solid cylinder is 37 metres. If the total surface area of the cylinder be 1628sq metres, find its volume.
Let the Radius of the solid cylinder be ‘r’ m and its height be ‘h’ m.
Given,
Sum of radius and height of solid cylinder = 37 m
r + h = 37 m
r = 37 – h
Total surface area of solid cylinder = 1628 m2
Total surface area of solid cylinder is given by 2πr (h + r)
∴ 2πr (h + r) =1628 m2
Substituting the value of r + h in the above equation
⇒ 2πr × 37 = 1628 m2
⇒ r = 1628 × 7/22 × 1/2 × 1/37 m
⇒ r = 7 m
Since, r + h = 37 m
h = 37 – r m
h = 37 – 7 m = 30 m
Volume of solid cylinder = πr2h
= 22/7 × 72 × 30 m2
= 4620 m2