Rinki travelled 3/4 of the journey by car and the rest by bus if she covered 120 km in total what percent of journey she travelled by bus
answer is 25%
Answers
Answer:
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Step-by-step explanation:
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Answer:
Answer:
Step-by-step explanation:
Solution :-
Let the speed of train and bus be u km/h and v km/h.
According to the Question,
60/u + 240/v = 4 ... (i)
100/u + 200/v = 25/6 ... (ii)
Putting 1/u = p and 1/v = q in the equations, we get
⇒ 60p + 240q = 4 ... (iii)
⇒ 100p + 200q = 25/6
⇒ 600p + 1200q = 25 ... (iv)
Multiplying equation (iii) by 10, we get
⇒ 600p + 2400q = 40 .... (v)
Subtracting equation (iv) from (v), we get 1200q = 15
⇒ q = 15/200 = 1/80 ... (vi)
Putting equation (iii), we get
⇒ 60p + 3 = 4
⇒ 60p = 1
⇒ p = 1/60
⇒ p = 1/u = 1/60 and q = 1/v = 1/80
⇒ u = 60 and v = 80
Speed of train = 60 km/h
Speed of bus = 80 km/h.