Answer:
Part A)

Part B)

Explanation:
Part A)
we know that
The volume of the sink is

step 1
Find the volume of the cylindrical cup
The volume is equal to

we have
----> the radius is half the diameter

substitute the values


step 2
To find the number of cups of water, divide the total volume of the sink by the volume of the cylindrical cup

Round to the nearest whole number

Part B)
we know that
The volume of the sink is

step 1
Find the volume of the cylindrical cup
The volume is equal to

we have
----> the radius is half the diameter

substitute the values


step 2
To find the number of cups of water, divide the total volume of the sink by the volume of the cylindrical cup

Round to the nearest whole number (Round up)
