Question

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.

Answer 1

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`