A monkey start climbing up a tree 20ft tall.Each hour it hops 3 ft and slips back 2ft.How much time would it take the monkey to reach the top.	Select:
A) 15 hrs
B) 18 hrs
C) 19 hrs
D) 17 hrs
E) 16 hrs
if monkey hops 3ft and slips back 2ft in a hour, it means the monkey hops (3ft-2ft)= 1ft/hr.   similarly in 17hrs it wil be 17ft.   Bt since the height of the tree is 20ft, so if the monkey hops up the tree in the next hr i.e 18th hr then it reaches at the top of the tree.   hence it takes 18 hrs for monkey to reach at the top   ANSWER:18 hrs  (3  -2  )= 
<gadget id="calculator">  (3  -2  )</gadget>
<output>1</output>
1ft/hr.   similarly in 17hrs it wil be 17ft.   Bt since the height of the tree is 20ft, so if the monkey hops up the tree in the next hr i.e 18th hr then it reaches at the top of the tree.   hence it takes 18 hrs for monkey to reach at the top   ANSWER:18 hrs
<result>B</result>
A monkey start climbing up a tree 20ft tall.Each hour it hops 3 ft and slips back 2ft.How much time would it take the monkey to reach the top.