Final answer:
The ratio of the distance moved per revolution of the child's bicycle is 7:4.9.
Step-by-step explanation:
To find the ratio of the distance moved per revolution of the child's bicycle, we need to calculate the distance moved per revolution for both the adult-sized bicycle and the child-sized bicycle.
For the adult-sized bicycle, it moves 35 feet for every 5 revolutions. Therefore, the distance moved per revolution is 35 feet / 5 revolutions = 7 feet/revolution.
For the child-sized bicycle, it moves 49 feet for every 10 revolutions. Therefore, the distance moved per revolution is 49 feet / 10 revolutions = 4.9 feet/revolution.
The ratio of the distance moved per revolution of the child's bicycle is 4.9 feet/revolution to 7 feet/revolution, which can be simplified to 7:4.9.