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?

June 24, 2023

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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?
Type	multiple_choice
Option	4 pm	incorrect
Option	5 pm	incorrect
Option	6 pm	correct
Option	None of these	incorrect
Solution	Net ascent of the monkey in 1 h = ( 30 – 20 ) feet = 10 feet. So, the monkey ascends 90 feet in 9 h i.e, till 5 pm Clearly , in the next 1 h i.e., till 6 pm the monkey ascends remaining 30 feet to touch the flag.

In the following question, four number pairs are given. In each pair the number on left side of (–) is related to the number of the right