How many planks of dimensions (5m × 25cm × 10cm) can be stored in a pit which is 20 m long, 6 m wide and 50 cm deep?
Volume of a cuboid = Length × Breadth × Height
1 m =100 cm
Volume of pit = 20 m × 6 m × 0.5 m = 60 m3
Volume of plank = 5 m × 0.25 m × 0.1 m = 0.125 m3
No. of planks = 
= 480
8