Correct option is C
Solution:
Initially, the front wheels make 2 revolutions for every 1 revolution of the rear wheels. This means the front wheel diameter is half of the rear wheel diameter.
From the graph:
· The vertical axis shows front revolutions per rear revolution.
· As the absolute change in diameters increases, this ratio decreases from 2 and approaches 1.
Key idea: If both the front and rear wheel diameters are increased equally, then:
· The difference between their diameters becomes less significant relative to their sizes.
· As a result, the ratio of revolutions moves closer to 1, exactly as shown in the plot.
Why other options are incorrect: · (a) Only decreasing rear diameter would increase the ratio, not reduce it.
· (b) Decreasing both equally would not smoothy approach 1 as shown.
· (d) Decreasing rear and increasing front would cause the ratio to cross below 1, which is not shown.
Correct answer: (c) Both the rear and front wheel diameters are increased equally
