Arpit sold a watch at a …
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Arpit sold a watch at a gain of 5%to mohit and mohit sold it to rohit at a gain of 4%if rohit paid rupees 91 for it then find the cost price of arpit watch
Posted by Shahista Anjum 7 years, 2 months ago
- 3 answers
Manish Gandhi 7 years, 2 months ago
Let's Arpit paid Rs. x/- for the watch which will be the CP. Arpit's SP will be Mohit's CP as Mohit bought it from Arpit. In the same way, Rohit bought it from Mohit so Mohit's SP will be Rohit's CP.
=> Mohit's CP = x * 105/100 = 1.05x
Mohit further sold it to Rohit => Rohit's CP = 1.05x * 104/100 = 1.0920 x/-
=> 91 = 1.0920 x
x = 91/1.0920 = 83.33/- (Answer)
Naveen Sharma 7 years, 2 months ago
Ans. Let Cost Price of Arpit Watch = y
Gain % = 5%
Selling Price for Arpit = \({y \times 105 \over 100 } = {21y\over 20}\)
Selling Price for Arpit is Cost price for Mohit = \(21y\over 20 \)
Gain % = 4 %
Selling Price For Mohit = \({21y\over 20} \times {104\over 100} = {21y\times 26 \over 20 \times 25} = {546y\over 500}\)
Selling price For Mohit is Cost price for Rohit, So
=> \({546y\over 500} =91\)
=> \(y = {250\over 3} = 83{1\over 3}\)
Cost Price of Arpit Watch = \(Rs. \space 83{1\over 3}\)
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Rashmi Bajpayee 7 years, 2 months ago
Let Cost price of watch be Rs.100
Then Selling price of watch for Arpit = 100 + 5 = Rs.105
Now, SP for Arpit = CP for Mohit.
Mohit sold watch at a gain of 4%, Then,
Selling price of watch for Mohit = 105 + 4% of 105 = 105 + 4.20 = Rs.109.20
Now, Selling price of watch for Mohit = CP of watch for Rohit.
Therefore,
Since Rohit paid Rs,109.20, when CP = Rs.100
Therefore, Rohit paid Rs.1, when CP = 100/109.20
Therefore, Rohit paid Rs.91, when CP = 100/109.20 x 91 = Rs.83.33
The cost price of watch was Rs.83.33.
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