The height of a cylinder whose radius is 7 cm and the total surface area is 968 sq cm will be_________:
Answer & explanation
Correct answer: option 1
Total surface area = Curved surface area + Area of 2 circles
Total surface area = 2πrh + 2πr2
Total surface area = 2πr (h + r)
968 = 2 x \(\frac{22}{7}\) x 7 (7+h)
h = 15 cm