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? Select the correct option
A) 19%  B) 10%  C) 22%  D) 16%  E) None
Solution:   given ratio of Ram and Shayam's weight = 7:5   Hence, (x-15)/(15-10) = 7/5   Or, x = 22%.   Answer: Option 22%
<result>C</result>
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?