Question

gopi sold a watch to ibrahim at 12% gain and ibrahim sold it to john a a loss of 5%.if the john paid rs 1330 then find how much dd gopi sold it

Answer 1

let gopis cost price = rs.100
gain = 12%
gopi's selling price = 100 + 12/100 *100
                                  = 100+12 = 112 ( here i have done cutting method as it is computer i cannot cut here )
ibrahim loss = 5% 
ibrahims selling price = 112 - 5/100  112
                                      = 112-5.6
                                      = 106.4
for 100 rs  loss is = 106.4
for 1330 how much we get = 1330 / 106.4 * 100 
                                               = 1250 rs
gopi sold price = 1250 [ 100+12 / 100]
                                   = 1400

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