1.

A person on tour has Rs. 10800 for his expencses. If he extends his tour by 4 days, he has to cut down his daily expenses by Rs. 90. Find the original duration of the tour.

Answer» Correct Answer - 20 days
Let the original duration of the tour be x days. Then,
`(10800)/(x)-(10800)/((x+4))=90implies(1)/(x)-(1)/(x+4)=(1)/(120)impliesx^(2)+4x-480=0`
`:." "x^(2)+24x-20x-480=0.`


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