World Languages, asked by s1266aakansha7826, 5 months ago

Identify the person shown in the picture.

A) Sir Isaac Newton.
B) Albert Einstein.
C) Aryabhatta
D ) Stephen hawking
E) None of these

First and helpful will mark as brainlist ​

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Answers

Answered by TheLeukocytes
1

Albert Einstein

\displaystyle\Huge \bf\red{\underline{\underline{ANSWER}}} </p><p>

Let the speed of the train be x km/hr and the speed of the bus is y km/hr.

So according to question and using

  \huge \boxed{\sf{Time = \frac{Distance}{speed}}} </p><p>

Total distance =300 km

Mansi travels 60 km by train and 300−60=240 by bus in 4 minute,

 \bf\frac{60}{x} + \frac{240}{y} =  \red4</p><p>

and 100 km by train, 300−100=200 by bus, and takes 10 minutes more,

 \bf {\frac{100}{x} + \frac{200}{y} = 4 + \frac{1}{6} = \frac{24 + 1 }{6} =  \purple{\frac{25}{6}}}</p><p>

Now, let

\bf\color{blue}{\frac{1}{x} = a}

and.

 \bf  \color{blue}{ \frac{1}{y} = b }

\bfthen 60a+240b=4.............(1)

\bf100a+200b=25/6----(2)

multiply (1) by 5 and (2) by 6 we get

\bf300a+1200b=20..........(3)

\bf600a+1200b=25...........(4)

Subtracting (3) and (4) we get

\bf \green{−300a=−5}

\bf{a = \frac{1}{60}}

Putting the value of a in (1) we get

\bf{60 \times \frac{1}{60} + 240b = 4}

</p><p> \bf240b = 3 \\  \\ \bf b = \frac{1}{80}

Now ,

 \bf\frac{1}{x} = a \\  \\  \bf \red{a = 60 km/h \:  \blue \bigstar}

 \bf\frac{1}{y} = b \\  \\  \bf \red {b = 80 km/h \:  \pink \bigstar}

Hence, the speed of the train is 60 km/hr and the speed of the bus is 80 km/hr.

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