How many planks, each 2m long, 14 cm broad and 5 cm thick can be prepared from a block which is 8m long, 70 cm broad and 45 cm thick.

Explanation

Volume odf desired block=`l xx b xx h`

`= 2m xx 14 cm xx 5 cm`

`= 200 xx 14 xx 5`

`= 1400 cm^3`

Volume of given block= `8m xx 70 cm xx 45 cm`

`= (800 xx 70 xx 45) cm^3`

Volume of `x`dsired block = volume of given block

`x xx (200 xx 14 xx 5) cm^3 = (800 xx 70 xx 45) cm^3 `

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