Question

If a person travels 196 meters in $x$ seconds with speed $x$ m/s, then find the sum of its speed and time.

• A. $14$
• B. $28$
• C. $20$
• D. $35$

Answer 1

The correct option is B $28$

Given the speed and time taken are $x$ m/s and $x$ seconds respectively.
We know $\frac{Distance}{Time}=Speed$
$\Rightarrow \frac{196}{x}=x\Rightarrow x^2=196$
$\Rightarrow x=\pm 14$
As time and speed cannot be negative so $x=14$
Hence the sum of time and speed is $14+14=28$