Question 28
Mensuration of SolidsA cylindrical container closed at both ends, has a radius of 7cm and height 5cm. (Take π = 22/7)
Find the total surface area of the container.
- A.35cm3
- B.154cm3
- C.220cm3
- D.528cm3
- E.770cm3
Show the answer and explanation
Answer: D (528cm3)
Explanation
Total surface area = 2πr2 + 2πrh = 2(154) + 2 × 22/7 × 7 × 5 = 308 + 220 = 528cm2 (the options print the unit as cm3).