- A
- B
- C
- D
Step-by-Step Solution
. Cone CSA = π*. Hemisphere CSA = 2*π*. Total .
Answer: A)
A buoy (sea marker) is made by joining a cone to a hemisphere, both radius 7 cm. The cone height is 24 cm. The whole exposed surface = cone curved + hemisphere curved. Find its slant height first, then the total surface area in (π = ). Total area is: (CSA = curved surface area, TSA = total surface area)
Class 10Surface Area of Combined SolidsMensuration
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Surface Area of Combined Solids practice questions
More Class 10 Surface Area of Combined Solids practice
A solid is a cylinder (radius 6 cm, height 10 cm) with a cone (same radius, height 8 cm)…A trophy is a hemisphere (radius 3.5 cm) on top of a cylinder (radius 3.5 cm, height 15…A cuboidal box 10 cm x 10 cm x 24 cm has a hemisphere (radius 5 cm) fixed centrally on…Two cones share a common circular base (a bicone), each of base radius 0.7 cm; the upper…A hot-water bottle model is a cylinder (radius r, height h) with a hemisphere of radius…