Level:
Project ID:
1003082204
Source Problem:
Accepted:
1
Clonable:
1
Easy:
0
By how many percent should we lengthen the edge of a cube so that its surface area is increased by \( 21\% \)?
by \( 10\% \)
by \( 21\% \)
by \( 11\% \)
by \( 42\% \)