Practicing Success
Practicing Success
CUET Preparation Today
A solid has 15 vertices and 20 edges. How many faces does it have? |
25 18 7 15 |
7 |
According to Euler's formula V + F - E = 2 ⇒ 15 + F - 20 = 2 ⇒ F - 5= 2 ⇒ F =7 |
