Answer-A sold a watch to B at a profit of 20%. B sold it to C at 30% profit. C sold it to D at 10% loss. If...

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Let A purchased at Rs. 100 rArr A sold to B at a 20 profit  100 times 120100 rArr A sold to B at a 20 profit  120 rArr As profit  120 - 100 rArr As profit  20 ----1 rArr B sold to C at a 30 profit  120 times 130100 rArr B sold to C at 30 profit  156 rArr Bs profit  156 - 120 rArr Bs profit  36 ----2 rArr C sold to D at a 10 loss  156 times 90100 rArr C sold to D at a 10 loss  140.4 From 1 and 2 The difference in profit of B and A rArr Bs profit - As profit  36 - 20 rArr Bs profit - As profit  16 So. 16x  80 rArr x  5 rArr D bought it for 140.4 times 5 there4 D bought it for Rs. 702

A sold a watch to B at a profit of 20%. B sold it to C

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