Question

A rectangular block of metal measuring 4cm by 5 cm by 6cm was melted down to make a block 8 cm long by 3 cm wide. How high was the block

Answer 1

Volume of both the blocks has to be the same.
volume of a cuboidal block = length * width * height
Volume of original block = 4*5*6 = 120 cm^3
volume of the new block also has to be 120 cm^3
thus 8*3*height of new block= 120
thus height of new block has to be 5 cm