4) From the railway station I took a rickshaw to go home. It is decided
that I have to pay Rs. X for the first kilometre and for each kilometre Rs.
Y for the next. For 10 kilometres the fare is Rs. 40 and for 16 kilometres
fare is Rs. 58. Find the fare for the first kilometre.
Answers
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SOLUTION
GIVEN
- From the railway station I took a rickshaw to go home.
- It is decided that I have to pay Rs. X for the first kilometre and for each kilometre Rs. Y for the next.
- For 10 kilometres the fare is Rs. 40 and for 16 kilometres fare is Rs. 58.
TO DETERMINE
The fare for the first kilometre.
EVALUATION
Here it is given that he has to pay Rs. X for the first kilometre and for each kilometre Rs. Y for the next.
So fare for 10 kilometers
= Fare for first kilometre + Fare for 9 kilometers
= X + 9Y
So fare for 16 kilometers
= Fare for first kilometre + Fare for 15 kilometers
= X + 15Y
So by the given condition
X + 9Y = 40 - - - - - (1)
X + 15Y = 58 - - - - - (2)
Equation 2 - Equation 1 gives
6Y = 18
From Equation 1 we get
X = 40 - 9Y
FINAL ANSWER
Hence the fare for the first kilometre = Rs. 13
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