What is the height of a solid cylinder whose radius is 7 cm and total surface area is 1144 cm2 ? (Use π =22/7)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 19 cm.
The radius of the cylinder = 7 cm
Total surface area = 1144 cm2
Total surface area of the cylinder = 2πr(r + h)
1144 = 2 × 22/7 × 7(7 + h)
26 = 7 + h
h = 19 cm