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karan Sharma

Nov 1, 2013

A person on tour has Rs 360 for his expenses.

A person on tour has Rs 360 for his expenses. If he extends his tour for 4 days, he has to cut down his daily expenses by Rs 3. Find the original duration of the tour.

Answers(2)

Answer

Kishore Kumar

Amount with the person = Rs 360
Let the original number of duration of the tour be x days
Daily expenses per day = Rs 360/x
Given that his tour is extended for 4 days
Hence daily expenses per days = Rs 360/(x + 4)
Therefore

⇒ 360x + 1440 – 360x = 3(x2 + 4x)
⇒  1440 = 3x2 + 12x
⇒  3x2 + 12x – 1440 = 0
⇒  x2 + 4x – 480 = 0
⇒  x2 + 24x – 20x – 480 = 0
⇒  x(x + 24) – 20(x + 24) = 0
⇒  (x + 24)(x – 20) = 0
⇒  (x + 24) = 0 or (x – 20) = 0
∴ x = –24 or x = 20
Since x cannot be negative, x = 20
Hence his original duration of the tour is Rs 20

Syeda

Answer.

Amount with the person = Rs 360
Let the original number of duration of the tour be x days
Daily expenses per day = Rs 360/x
Given that his tour is extended for 4 days
Hence daily expenses per days = Rs 360/(x + 4)
Therefore


⇒ 360x + 1440 – 360x = 3(x2 + 4x)
⇒  1440 = 3x2 + 12x
⇒  3x2 + 12x – 1440 = 0
⇒  x2 + 4x – 480 = 0
⇒  x2 + 24x – 20x – 480 = 0
⇒  x(x + 24) – 20(x + 24) = 0
⇒  (x + 24)(x – 20) = 0
⇒  (x + 24) = 0 or (x – 20) = 0
∴ x = –24 or x = 20
Since x cannot be negative, x = 20
Hence his original duration of the tour is Rs 20

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