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प्रश्न
Given that 1 cubic cm of marble weighs 0.25 kg, the weight of marble block 28 cm in width and 5 cm thick is 112 kg. Find the length of the block.
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उत्तर
Let the length of the block be 1cm
Then, volume = `lxx28xx5cm^3`
∴weight = `140lxx0.25 cm^3`
According to the question
⇒ `112=1401xx0.25`
⇒ `l=(112)/(1401xx0.25)=3.2cm`
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