a car travilling at a speed of 140 km p/s cover 420 km. how much time will it take to cover 280 km.
Answers
Answered by
0
Use Direct proportional method!
120km/hr. = 420km.
x km/hr. = 280 km.
Therefore,
420x = 33,600
x = 33,600/420
.:. x = 80 Km/Hr.
It would take 80km/hr to cover 280Km.
Answered by
5
Solution: First, we need to find the time required to cover 420 km.
Speed = Distance/Time
140 = 420/T
T = 3 hours
Applying the unitary method,
420 km = 3 hours
1 km = 3/420 hour
280 km = (3/420) x 280 = 2 hours
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