In a mixture of 70 kg of rice and wheat, 40% of mixture is wheat, what quantity

Question

In a mixture of 70 kg of rice and wheat, 40% of mixture is wheat, what quantity of wheat must be added to the mixture so that concentration of rice becomes 30% in the mixture?

Options:

A . 45 kg

B . 60 kg

C . 80 kg

D . 70 kg

Answer: Option D

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