PLEASE ANSWER MY QUESTIONS
Answers
5.THE SPEED OF THE SECOND CAR IS 35kmph
Answer:
(5) 46.67 kmph
(6) 25.5 seconds
(7) 450 m
Step-by-step explanation:
Question (5):
Car A:
Speed = 40 kmph
Distance = 560 km
Time taken = Distance ÷ Speed
Time taken = 560 ÷ 40 = 14 hours
Car A takes 14 hours to reach Place B
Car B:
Time taken by Car B = 14 - 2 = 12 hours
Distance = 560 km
Speed = Distance ÷ Time
Speed = 560 ÷ 12 = 46.67 kmph
Answer: The speed of car B is 46.67 kmph
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Question (6):
Find the total distance needed to clear the second train:
Distance = 225 + 200 = 425m = 0.425 km
Speed = 60 kmph
Find the time needed:
Time = Distance ÷ Speed
Time = 0.425 ÷ 60 = 17/2400 hour = 17/40 mins = 25.5 seconds
Answer:25.5 seconds
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Question (7):
Speed = 80 kmph
Bridge = 350 m
Time taken = 36 seconds = 0.01 hour
Find the total distance traveled:
Distance = Speed x Time
Distance = 80 x 0.01 = 0.8 km = 800 m
Find the length of the train:
Length of the train = 800 - 350 = 450 m
Answer: The length of the train is 450 m