Answer:
= 22.5 m/s
Step-by-step explanation:
The acceleration of a moving body is calculated by the formula;
a = (v-u)/t
Where; a is the acceleration of the body
v is the final velocity of the body
u is the initial velocity of the body and
t is the time taken
In this case;
u = 15 m/s
a = 2.5 m/s²
t = 3 seconds
2.5 m/s² = ( v- 15 m/s)/3 seconds
2.5 × 3 = v - 15
7.5 = v - 15
v = 7.5 + 15
= 22.5 m/s