Harry and his wizard friends measured the lengths of their magic wands. how much longer is hermione's wand than ginny's wand? \text{cm}cmstart text, c, m, end text wand length harry 29 \text { cm}29 cm29, start text, space, c, m, end text ron 24 \text { cm}24 cm24, start text, space, c, m, end text hermione 31 \text { cm}31 cm31, start text, space, c, m, end text ginny 26 \text { cm}26 cm26, start text, space, c, m, end text