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Question
An ice-cream brick measures 20 cm by 10 cm by 7 cm. How many such bricks can be stored in deep fridge whose inner dimensions are 100 cm by 50 cm by 42 cm?
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Solution
\[\text { Dimension of an ice cream brick = 20 cm } \times 10 cm \times 7 cm\]
\[\text { Its volume = length } \times \text { breadth } \times\text { height } = (20 \times 10 \times 7) {cm}^3 = 1400 {cm}^3 \]
\[\text { Also, it is given that the inner dimension of the deep fridge is 100 cm } \times 50 cm \times 42 cm . \]
\[\text { Its volume = length } \times\text { breadth } \times \text { height } = (100 \times 50 \times 42) {cm}^3 = 210000 {cm}^3 \]
\[ \therefore \text { The number of ice cream bricks that can be stored in the fridge }= \frac{\text { volume of the fridge }}{\text { volume of an ice cream brick }} = \frac{210000 {cm}^3}{1400 {cm}^3} = 150\]
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