A motorist travelling at 72\(kmh^{-1}\) had his eyes shut for 0.4s during a hard sneeze. Calculate the distance covered by him during this time interval.

A motorist travelling at 72\(kmh^{-1}\) had his eyes shut for 0.4s during a hard sneeze. Calculate the distance covered by him during this time interval.

Answer Details

The distance covered by the motorist can be calculated using the formula: distance = speed x time We are given that the speed of the motorist is 72 km/h, but we need to convert it to meters per second (m/s) to be consistent with the time interval given in seconds. 1 km/h = 0.27778 m/s (approx.) So, speed = 72 km/h x 0.27778 m/s/km/h = 20 m/s (approx.) The time interval given is 0.4 s. Putting these values in the formula: distance = speed x time distance = 20 m/s x 0.4 s = 8 m (approx.) Therefore, the distance covered by the motorist during the 0.4s with eyes shut is approximately 8 meters. Hence, the correct option is (D) 8.0m.