A courtyard is 25 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 : Choose the correct choice from the following choices.
A) 16000	B) 18000	C) 20000	D) 22000	E) none of these

Rationale: "explanation : number of bricks = courtyard area / 1 brick area = ( 2500 × 1600 / 20 × 10 ) = 20000 option c"
Answer: C