Jawaban:

10 cm

Penjelasan dengan langkah-langkah:

Rumus volume balok :

begin mathsize 14px style bold Volume bold equals bold italic p bold cross times bold italic l bold cross times bold italic t end style

Maka, panjang balok :

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row Volume equals cell p cross times l cross times t end cell row 2600 equals cell p cross times 2 p cross times 13 end cell row 2600 equals cell 2 p squared cross times 13 end cell row 2600 equals cell 26 p squared end cell row 100 equals cell p squared end cell row cell plus-or-minus 10 end cell equals p end table end style

Jadi, panjang balok adalah 10 cm.