An object starting from rest travels `20 m` in first `2 s` and `160 m` in next `4 s`. What will be the velocity after `7s` from the start.

Explanation

To solve the problem step by step, we will analyze the motion of the object in two parts: the first 2 seconds and the next 4 seconds.

### Step 1: Analyze the first 2 seconds
- The object starts from rest, so the initial velocity (u) = 0 m/s.
- The distance traveled in the first 2 seconds (s1) = 20 m.
- The time (t1) = 2 s.

Using the equation of motion:
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