How many plants will be there in a circular bed whose outer edge measure 32 cms, allowing 4 cm2 for each plant ?  Answers:
A) 18
B) 750
C) 24
D) 20
E) none of these

Rationale: "circumference of circular bed = 32 cm area of circular bed = ( 32 ) 2 â  „ 4 ï € space for each plant = 4 cm 2 â ˆ ´ required number of plants = ( 32 ) 2 â  „ 4 ï € ã · 4 = 20.36 = 20 ( approx ) answer d"
Answer: D