Weights of two friends Ram and Shyam are in the ratio 3:5. 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 choice from the following choices:
A) 18% B) 10% C) 21% D) 16% E) None
Solution:   given ratio of Ram and Shayam's weight = 3:5   Hence, (x-15)/(15-10) = 3/5   Or, x = 18%.   18%nswer: Option 18%
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Weights of two friends Ram and Shyam are in the ratio 3:5. 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?