Question

for each situation, tell whether you would measure using length, units, square units, or cubic units. explain your reasoning.

1. franco is measuring the amount of wall space in his room so that he knows how much paint to buy.
2. katrina wants to know how much water is inside her fish tank.
3. pete wants to know how far he walks from home to school.

use your understanding of area and volume to explain your answer.

1. hannah wants to know how much air is inside her balloon. she thinks that she should calculate the area of the balloon. henry suggests that she should find the volume of the balloon. who is correct? explain.

Explanation:

Step1: Wall space is area

Square units measure area, so for Franco, square units.

Step2: Water in tank is volume

Cubic units measure volume, so for Katrina, cubic units.

Step3: Distance is length

Length units measure distance, so for Pete, length units.

Step4: Air in balloon is volume

Volume measures space inside 3 - D object, so Henry is right, cubic units for Hannah.

Answer:

1. Square units
2. Cubic units
3. Length units
4. Henry is correct, cubic units