800 km/h
Hi there !
1 hour = 60 min
30 min = 0.5 hour
400 km ............ 0.5 h
x km .............. 1 h
x = 400km×1h/0.5h
= 800 km/h
Good luck
Answer:
800km/hr
Explanation:
Speed = Distance/Time
Distance = 400km
Time = 30mins = 1/2 hr
Speed = 400/(1/2) = 800km/hr
