Math, asked by abdulrashidshaikh485, 4 months ago

Mahesh travels 300 km to his home partly by train and partly by bus. He takes 6 hours If he travels 50 km by train
and the remaining by bus. If he travels 100 kan by train and the remaining by bus, he takes 2 hours,
Find the speed of the train and the bus respectively.​

Answers

Answered by BrainlyBAKA
4

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\bf{https://brainly.in/question/37581179}

Let the speed of train and bus be u km/h and v km/h respectively.

According to the question,

\frac{60}{u} + \frac{240}{v} = 4....(i)

\frac{100}{u} + \frac{200}{v} = 4 + \frac{10}{60} = \frac{25}{6} ....(ii)

Let \frac{1}{u} = p\: and \frac{1}{v} = q

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The given equations reduce to:

60p + 240q = 4 ....(iii)

100p + 200q = \frac{25}{6}

600p + 1200q = 25....(iv)

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Multiplying equation (iii) by 10, we obtain:

600p + 2400q = 40....(v)

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Subtracting equation (iv) from equation (v), we obtain:

1200q = 15

q = \frac{15}{1200} = \frac{1}{80}

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Substituting the value of q in equation (iii), we obtain:

60p + 3 = 4

60p = 1

p = \frac{1}{60}

:. p = \frac{1}{u} = \frac{1}{60}, q = \frac{1}{v} = \frac{1}{80}

u = 60 km/h , v = 80 km/h

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Thus, the speed of train and the speed of bus are 60 km/h and 80 km/h respectively.

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