A monkey start climbing up a tree 18 ft tall.Each hour it hops 3 ft and slips back 2 ft. How much time would it take the monkey to reach the top.	Choose the correct choice.
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 15hrs it wil be 15ft.   Bt since the height of the tree is 18ft, so if the monkey hops up the tree in the next hr i.e 16th hr then it reaches at the top of the tree.   hence it takes 16 hrs for monkey to reach at the top   ANSW16 hrsR:16 hrs  (3  -2  )= 
<gadget id="calculator">  (3  -2  )</gadget>
<output>1</output>
1ft/hr.   similarly in 15hrs it wil be 15ft.   Bt since the height of the tree is 18ft, so if the monkey hops up the tree in the next hr i.e 16th hr then it reaches at the top of the tree.   hence it takes 16 hrs for monkey to reach at the top   ANSW16 hrsR:16 hrs
<result>E</result>
A monkey start climbing up a tree 18 ft tall.Each hour it hops 3 ft and slips back 2 ft. How much time would it take the monkey to reach the top.