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प्रश्न
How many stamps are needed to cover the rectangle?
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उत्तर
The number of stamps that can be placed in the rectangle
= 7 × 4
= 28
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संबंधित प्रश्न
The farthest objects in our Universe discovered by modern astronomers are so distant that light emitted by them takes billions of years to reach the Earth. These objects (known as quasars) have many puzzling features, which have not yet been satisfactorily explained. What is the distance in km of a quasar from which light takes 3.0 billion years to reach us?
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