Weights of two friends Ram and Shyam are in the ratio of 4 : 5. Ram’s weight increases by 10% and the total weight of Ram and Shyam together becomes 82.8 kg, with an increase of 15%. By what per cent did the weight of Shyam increase?  Pick:	A) 12.5%	B) 17.5%	C) 19%	D) 21%	E) None of these
Let the weights of Ram and Shyam be 4x and 5x. Now,according to question,   4x×110/100+Shyam?snewwt4x×110100+Shyam?s new wt = 82.8........ (i)   and 4x + 5x = 9x+115/100 4  + 5= 
<gadget id="calculator"> 4  + 5</gadget>
<output>9</output>
9x+115/100= 82.8........ (ii)   From (ii), x = 8   Putting in (i),   we get Shyam’s new wt = (82.8 – 35.2) = 47.6   % increase in Shyam’s wt = (47.6−40/40×100) = 19   Answer 19%
<result>C</result>
Weights of two friends Ram and Shyam are in the ratio of 4 : 5. Ram’s weight increases by 10% and the total weight of Ram and Shyam together becomes 82.8 kg, with an increase of 15%. By what per cent did the weight of Shyam increase?