An unusual bicycle has 20 spokes on the front wheel and twice as many spokes on the back wheel. How many spokes does the bicycle have? Let's be accurate as possible.
The back wheel has double the spokes the front wheel has, which means the back wheel has 20 * 2 = 40 spokes. In total, the bicycle has 20 + 40 = 60 spokes.
The answer: 60.