Answer:
84 inches
Step-by-step explanation:
A girl is exactly one yard tall.
one yard = 36 inches
Her sister is 1/3 of a yard taller = 36 + [tex](\frac{1}{3}\times 36)[/tex]
= 36 + 12
= 48 inches
Total inches when they added together = 48 + 36 = 84 inches