Final answer:
Calculating Tom's height requires knowing his older sister's height, as it's 10 inches more than one third of her height. Without the sister's height, we cannot determine Tom's height.
Step-by-step explanation:
To solve for Tom's height, we first need to establish a relationship based on the information given. We know that Tom's height is 10 inches more than one third of his older sister's height. Let's use the variable S to represent the sister's height in inches. The problem can then be expressed as:
Tom's Height = (1/3) × S + 10
Unfortunately, without knowing the sister's exact height, we cannot calculate Tom's exact height. Additional information on the sister's height is required to provide a numerical answer.