how many plants will be there in a circular bed whose outer edge measure 31 cms , allowing 4 cm 2 for each plant ?
circumference of circular bed = 31 cm area of circular bed = ( 31 ) 2 â  „ 4 ï € space for each plant = 4 cm 2 â ˆ ´ required number of plants = ( 31 ) 2 â  „ 4 ï € ã · 4 = 19.11 = 19 ( approx ) answer a
divide(circle_area(divide(31, multiply(2, const_pi))), const_4)