Question

Which is example of inverse proportion?

• A. Length of edge of square & its area
• B. Speed and time taken
• C. Length of edge of square & its perimeter
• D. Quantity of pencils & total cost

Answer 1

Answer: (B)

Speed and time taken

2 quantities say it be $x,y$ are said to be in inverse proportion when the increse in value of $x$ , leads to the decrease 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 B