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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 from the ground ?
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 from the ground ?
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Solution
The correct option is A 6 PM
Clearly, the monkey climbs 10 feet in one hour. So, it will climb upto a height of 90 feet in 9 hours i.e. at 5 pm. It will then ascend a height of 30 feet in the next hour too touch the peak at 6 pm.
Hence, option (C) is the correct answer.
Clearly, the monkey climbs 10 feet in one hour. So, it will climb upto a height of 90 feet in 9 hours i.e. at 5 pm. It will then ascend a height of 30 feet in the next hour too touch the peak at 6 pm.
Hence, option (C) is the correct answer.
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