Answer:
58.6 seconds
Step-by-step explanation:
Speed of ostrich = 43 km/hour
So in one hour, ostrich travels 43 km
This means that to travel 1 km, the ostrich will take 1/43 of an hour
to travel 0.7 km, the ostrich will take 0.7/43 of an hour
Since each hour is 3600 seconds, that would mean that the ostrich will take 0.7/43 x 3600 = 58.6 seconds