Question

Which of the following is example of proportion?

• A. If speed of car increases, time taken will decrease
• B. If cost of fuel increases, speed of car increases
• C. If number of persons in car increases, speed of car increases
• D. If less the fuel more the speed

Answer 1

The correct option is A If speed of car increases, time taken will decrease

2 quantities say it be $x,y$ are said to be in proportion when the change in value of $x$ , leads to the equal change in value of $y$.

we know that,

$speed=\frac{distance}{time}$

i.e., Speed is directly proportion to distance and at a fixed distance inverse proportion to time.

hence at fixed distance, if speed increses, time taken will decrease and vice versa. which is Option A