дано

V-55км/ч

a-0,5м/с^2

t-30c

t-?

To find the value of t, we need to use the formula:

V = V0 + at

where:
V is the final velocity (55 km/h),
V0 is the initial velocity (0 km/h),
a is the acceleration (0.5 m/s^2),
t is the time (unknown).

First, we need to convert the given velocities to m/s:

V = 55 km/h = (55 * 1000 m) / (60 * 60 s) ≈ 15.28 m/s
V0 = 0 km/h = 0 m/s

Now, we can rearrange the formula to solve for t:

t = (V - V0) / a

t = (15.28 m/s - 0 m/s) / 0.5 m/s^2

t = 15.28 m/s / 0.5 m/s^2

t ≈ 30.56 s

Therefore, the value of t is approximately 30.56 seconds.