This question was previously asked in

Territorial Army Paper I : Official Practice Test Paper - 5

Option 3 : 6 p.m.

According to the 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, he covers → 10 feet per hour.

He covers first 90 feet in → 90 ÷ 10 = 9 hours.

Remaining 30 feet (120 - 90) in next one hour → 1 hour.

Thus, monkey climbs 120 feet in → 9 + 1 = 10 hours.

If he begins his ascent at 8.00 a.m, he touch a flag at 120 feet from the ground at 6 p.m.

As 8:00 a.m. + 10 hours = 6 p.m.

Hence, **6 p.m. **is the correct answer.