So, total time taken = 120 minutes = 2 hours.
Then, (25x + 8) - 22 is divisible by 28
⟺ (25x - 14) is divisible by 28 ⟺ 28x - (3x + 14) is divisible by 28
⟺ (3x + 14) is divisible by 28 ⟺ x = 14.
Therefore Total number of sweets = (25 x 14 + 8) = 358.
Then, 4x + 2y = 2 (x + y) + 14 ⟺ 4x + 2y = 2x + 2y + 14 ⟺ 2x = 14 ⟺ x = 7.
So, number = 10x + (11 - x) = 9x + 11.
Therefore (9x + 11) + 27 = 10 (11 - x) + x ⟺ 9x + 38 = 110 - 9x ⟺ 18x = 72 ⟺ x = 4.
Thus, ten's digit = 4 and unit's digit = 7.
Hence, required number = 47.
So, the monkey ascends 90 feet in 9 hours i.e. till 5 p.m.
Clearly, in the next 1 hour i.e. till 6 p.m. the monkey ascends remaining 30 feet to touch the flag.
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