A courtyard is 20 meter long and 16 meter board is to be paved with bricks of dimensions 20 cm by 10 cm. The total number of bricks required is?	Options.
A) 16000
B) 27778
C) 20000
D) 27999
E) 17799

Rationale: "number of bricks = courtyard area / 1 brick area = ( 2000 × 1600 / 20 × 10 ) = 16000 answer : a"
Answer: A