Question

How many planks,each of which is 3 m long, 15 cm broad and 5 cm thick can be prepared from wooden block 6 m long, 75 cm broad and 45 cm thick.

Answer 1

VOLUME OF PLANKS = L×B×H  

= 200×2.5×4 = 2000CM³

VOLUME OF WOODEN BLOCK = L×B×H

= 600×15×40 = 360000CM³

NUMBER OF PLANKS = VOLUME OF WOODEN BLOCK/VOLUME OF EACH PLANKS

= 360000/2000 = 180