A courtyard is 18 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) 22877 B) 27778 C) 20000 D) 27999 E) 14400

Rationale: "number of bricks = courtyard area / 1 brick area = ( 1800 × 1600 / 20 × 10 ) = 14400 answer : e"
Answer: E