Answer:
Question 4: number of ice-cream bricks = 150
Question 5: 3 days
Explanation:
Question 4:
First we will find volume of brick:
Volume of brick = 20 * 10 * 7 cm^3
Volume of brick = 1400 cm^3
Now find volume of deep freezer:
Volume of deep freezer = 100 * 50 * 42 cm^3
Volume of deep freezer = 210,000 cm^3
Now for finding number of bricks that can be placed in deep freezer:
number of ice-cream bricks = 210,000/1,400
number of ice-cream bricks = 150
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Question 5
Given that:
Population = 4000
Per person requirement per day = 150 liters
Total requirement per day = 4,000* 150 = 600,000 liters
Tank has:
length = l =20m
width = w =15.
height = h =6m
So the volume will be:
Volume = l*w*h
By putting values:
Volume = 1,800 m^3
As 1 cubic meter = 1,000 liters So,
Volume = 1,800,000 liters
As the per day requirement is 600,000 liters
So
1,800,000 liters will be last = 1,800,000/600,000 = 3 days
i hope it will help you!