Roohi travels 300km to herr homePartly by train and partly by bus. She

1.	Roohi travels 300km to herr homePartly by train and partly by bus. She take 4hours if she travel 60km by train and the remaining by bus. If she travel 100km by train and the remaining by bus, she take 10 min longer. Find the speed of train and bus seperately
Answer» Answer: 60/x+240/y= 4 100/x+ 200/y= 4.1/6 = 25/6 let 1/x=a and 1/y=b (60a+240b=4) 10 (100a+200b=25/6) 6 600a+ 2400b=40 600a+1200b=25/6 1200b=15 b=15/1200 b=1/80................(1) 60a+240/80=4 60a+3=4 60a=1 a=1/60.........(2) SPEED of train=60km/h speed of bus=80km/h

Roohi travels 300km to herr homePartly by train and partly by bus. She take 4hours if she travel 60km by train and the remaining by bus. If she travel 100km by train and the remaining by bus, she take 10 min longer. Find the speed of train and bus seperately

Answer»

Answer:

60/x+240/y= 4

100/x+ 200/y= 4.1/6 = 25/6

let 1/x=a and 1/y=b

(60a+240b=4) 10

(100a+200b=25/6) 6

600a+ 2400b=40

600a+1200b=25/6

1200b=15

b=15/1200

b=1/80................(1)

60a+240/80=4

60a+3=4

60a=1

a=1/60.........(2)

SPEED of train=60km/h

speed of bus=80km/h

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Roohi travels 300km to herr homePartly by train and partly by bus. She take 4hours if she travel 60km by train and the remaining by bus. If she travel 100km by train and the remaining by bus, she take 10 min longer. Find the speed of train and bus seperately

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