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Question
A monkey climbs 30 feet at the beginning of each hour and rests for a while when he slips back 20 feet before he again starts climbing in the beginning of the next hour. If he begins his ascent at 8.00 am, at what time will he first touch a flag at 120 feet high?
A monkey climbs 30 feet at the beginning of each hour and rests for a while when he slips back 20 feet before he again starts climbing in the beginning of the next hour. If he begins his ascent at 8.00 am, at what time will he first touch a flag at 120 feet high?
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Solution
The correct option is C 6 pm
Clearly the monkey climbs only 10 feet in each hour. He climbs 90 feet in 9 hours. Now the rest of 30 feet he will take 1 hour to reach the top. The monkey will touch the flag at 6 pm.
Clearly the monkey climbs only 10 feet in each hour. He climbs 90 feet in 9 hours. Now the rest of 30 feet he will take 1 hour to reach the top. The monkey will touch the flag at 6 pm.
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