isabella4141
31.12.2019 •
Physics
Two cars are 300 km apart. at noon, one car heads north at a rate of 50 km/hr. two hours later, the second car heads south at a rate of 60 km/hr. how fast is the distance between the cars changing at 5 pm?
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Ответ:
D = 730 Km
Explanation:
given,
distance between two car = 300 Km
at 12 : 00 PM
speed of car 1 = 50 Km/h in north direction
At 2:00 PM
speed of car 2 = 60 Km/hr in south direction
distance moved by car 1 in 5 hours
D₁ = speed x time
D₁ = 50 x 5
D₁ = 250 Km
distance moved by car 2 in 3 hours
D₂ = speed x time
D₂ = 60 x 3
D₂ = 180 Km
Distance between two cars at 5 PM
D = 300 + D₁ + D₂
D = 300 + 250 + 180
D = 730 Km
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