How many bricks each measuring 20cm x 10cm x 8cm, will be needed to build a wall 10m x 8m x 24.5m
Choose the correct choice:
A) 12250
B) 13400
C) 12500
D) 14340
E) none of these

Rationale: "explanation : no . of bricks = volume of the wall / volume of 1 brick = ( 1000 x 800 x 24.5 ) / ( 20 x 10 x 8 ) = 12250 answer : a"
Answer: A