At a speed of 15 feet per second, for 5 seconds, the monkey will travel 5 * 15 = <<5*15=75>>75 feet.
At a speed of 10 feet per second for 10 seconds, the monkey will travel 10 * 10 = <<10*10=100>>100 feet.
In total, the monkey will travel 75+100=<<75+100=175>>175 feet.
#### 175