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70 m
Explanation:
The area of the velocity time graph gives us the displacement
Because vt = s
The area above x - axis is +ve area
The area below x - axis is -ve area
The area of shape 1 = 1/2 × 2 × 20 = 20
The area of shape 2 = 20 × 2 = 40
The area of shape 3 = 1 × 20 = 20
The area of shape 4 = 1/2 × 20 × 1 = 10
The area of shape 5 = - (1/2 × 40 × 1) = -20
The area of shape 5 is negative because it is below x - axis
Adding all these, we get,
20 + 40 + 20 + 10 -20 = 70 m
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