Question

If the dimensions of rectangle are $"l"\&"b"$ and $"a"$ is its area, then for the ratio $\frac{a}{lb}$, the constant of proportionality is .

• A. 2
• B. 1
• C. 3

Answer 1

The correct option is B 1

Given for a rectangle, length $=l$, breadth $=b$.
Area $=a$
Now, the ratio of the area of the recatngle to the product of it's dimensions $=\frac{a}{lb}$
Now, area of a rectangle $=$ product of the dimension $=lb$
$\Rightarrow \frac{a}{lb}=1=K\left(\text{constant of proportionality}\right)$