Answer:
s = 45 m
Step-by-step explanation:
The velocity given in the question is uniform. Hence, the formula for the uniform velocity shall be used here. The formula is given as follows:
![s = vt](https://img.qammunity.org/2022/formulas/physics/high-school/8jqz7vhbvrderp7eg7a0snt1eaxysftuf5.png)
where,
s = distance traveled away from the brother = ?
v = constant speed = 3 m/s
t = time taken = (0.25 min)(60 s/1 min) = 15 s
Therefore, using these values in the formula we get:
![s = (3\ m/s)(15\ s)\\](https://img.qammunity.org/2022/formulas/physics/high-school/d7999fs4rtz8qfk34xqxr739n3br5eryay.png)
s = 45 m