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Two groups of pupils made 2 replicas of Mayon Volcano. The first one measures 80cm in diameter and 50cm height while the second one has 50cm radius and 60cm in height.
Find the difference between the volumes of the first and the second replica.

1. What is asked in the problem?
a. The volume of the first replica
b. The volume of the second replica
c. The total volume of the first and the second replicas
d. The difference between the volumes of the first and the second replica.

2. What is the hidden question in the problem?
a. The volume of the first replica
b. The volume of the second replica
c. The volume of the first and the second replicas
d. The difference between the volumes of the first and the second replica.

3. What is the volume of the first replica?
d. 84,733.33cm
a. 81,700.33cm b. 82,713.33cm
c. 83,733.33cm

4. What is the volume of the second replica?
a. 157,000cm b. 156,000cm
c. 155,000cm
d. 154,000cm

5. What is the formula in finding the answer?
а. (⅓πr²h) x (⅓πr²h)
b. (½πr²h) ÷ (⅓πr²h)
c. (⅓πr²h) + (⅓πr²h)
d. (⅓πr²h) - (⅓πr²h)
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