Weights of two friends Ram and Shyam are in the ratio 7:5. If Ram's weight is increased by 10% and total weight of Ram and Shyam become 82.8 kg, with an increases of 15%. By what percent did the weight of Shyam has to be increased?  Choose the correct answer
A) 19 %	B) 10 %	C) 22 %	D) 16 %	E) none

Rationale: "solution : given ratio of ram and shayam ' s weight = 7 : 5 hence , ( x - 15 ) / ( 15 - 10 ) = 7 / 5 or , x = 22 % . answer : option c"
Answer: C