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प्रश्न
A ship is 400m laig and 100m wide. The length of its model is 20 cm. find the surface area of the deck of the model.
उत्तर
20 cm represents 400 m
1 cm represesnts `400/20` = 20 cm
Width of model = `100/20` = 5 cm
Length of model = 20 cm
Surface area of the deck of the model= 5 cm x 20 cm
= 100 cm2
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