Answer:
≅ 53.33 km/h
Explanation:
To find the total time,
Velocity =Distance/time ⇒ time = distance/speed
= 1.6/67 ≅ 0.024 h*
Time spend for first half = (1.6/2)/88 ≅ 0.0091 h*
Therefore time spend to second half ≅ 0.015 h*
So average speed for second half ≅ 0.8/0.015 ≅ 53.33 km/h
*time can be converted to minutes but the answer will be the same.