Question

A sold a watch to B at 12% gain, B sold it to C at a loss of 5% if C paid Rs 1330 then find how much did A it for?

Answer 1

B's sp=1330

cp=(1330×100)/95

=1400₹

A's sp=₹1400

cp=(1400×100)/112

=₹1250

Answer 2

Let the CP of watch be x

Sold at the gain of 12% A to B

SP¹ => CP + Gain

SP¹ => x+12% =>x+12/100

SP¹ => 100x+12/100

SP¹ => 112x/100

Sold at loss of 5% B to C

SP² => CP - Loss

SP² => x - 5% => x-5/100

SP² => 100x - 5/100

SP² => 95x/100

112/100x * 95/100 =1330

x= 1330*100*100/112*95

by simply we get

x= 10*25*5

x= 10*125

x= 1250

CP= 1250 Ans