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amulya buys a 250 page notebook for Rs.20.what will he pay for another 225 page notebook

cost of 250 page note book =20

cost of 225 page notebook=20/250*225

cost of 1 page =20/250

                           =0.08

cost of 225 pages =225*0.08

                                  =18.00

                                 

                                 

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250 page = Rs. 20

1 page =20/250

225 page = 20/250*225

225 page = Rs.18.00

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Cost of  250 pages= Rs. 20

Cost of 1 page = 20/250=0.08

Cost of 225 pages= 0.08*225= Rs.18

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Cost for 250 page notebook = 20

Cost for 1 = 

20.   =.     4.       2    *.   225.  =.   18 as 25 

250.         50.     25

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Sachin bought a calculator for Rs.825 and sold it for Rs.105 more than he paid for it.How much did he get for it?
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