220 metres long yard, 21 trees are palnted at equal distances, one tree being at each end of the yard. what is the distance between 2 consecutive trees Choose the correct choice from the following choices:
A) 10
B) 12
C) 14
D) 11
E) 17
<gadget id="calculator">21 - 2</gadget>
<output>19</output>

<gadget id="calculator">19 + 1</gadget>
<output>20</output>

<gadget id="calculator">220 / 20</gadget>
<output>11</output>

<result>D</result>
220 metres long yard, 21 trees are palnted at equal distances, one tree being at each end of the yard. what is the distance between 2 consecutive trees
divide(220, add(subtract(21, 2), const_1))
"21 trees have 20 gaps between them , required distance ( 220 / 20 ) = 11 d"