Math, asked by naik30, 1 year ago

a tricycle is sold at a gain of 15% had it been sold for rupees 108 more than profit would have been 20% find the find its cost price

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Answered by Anonymous
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&lt;b&gt;&lt;marquee&gt;<br />             Gain = 15<br />           Let the Cost Price of tricycle (in Rupees) = x<br />               and the Selling Price = y<br />           therefore ,<br />                 gain % = y - x /x *100<br />                       15   =100(y-x)/x<br />                        15x = 100y - 100x<br />                         15x + 100x = 100y<br />                        115x = 100y<br />                       or y = 1.15x .........................(1st)<br />                 condition 2nd :<br />                 selling price = y+108<br />                 gain % = 20<br />                   ( y+108 - x /x)*100 = 20<br />                   or (y+108 -x ) = 20 *x/100<br />                       y+108 -x = x/5<br />                       y + 108 = x+x/5<br />                       y+108 = 5x+x /5<br />                       y+108 = 6x/5<br />                       y+108 = 1.2x<br />                 using y = 1.15x , we get<br />                 1.15x +108 = 1.2x<br />                 or 1.2x = 1.15x+108<br />                      1.2 x - 1.15x = 108<br />                   .05x = 108<br />                     5x/100=108<br />                    x/20 = 108<br />                   x = 108*20<br />                      x=2160 <br />
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