Question

if two solid hemispheres of same base radius are joined together along their bases, then curved surface area of this new solid is (a) 3πr² (b) 4πr² (c) 5πr² (d) 6πr²

Answer 1

Answer:

Step-by-step explanation:

We know that,

Curved surface area of a hemisphere =2πr  

2

 

So, when two solids hemispheres of same base radius are joined together along their bases, then

Curved surface area of newly formed solid sphere=2×2πr  

2

=4πr  

2

 

Hence, A is the correct option.