The task is to generate the correct answer for a given math problem.
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Question: Problem: the ratio of the radius of two circles is 1 : 3 , and then the ratio of their areas is ?

Answer: 1 : 9


Question: Problem: john left home and drove at the rate of 45 mph for 2 hours . he stopped for lunch then drove for another 3 hours at the rate of 45 mph to reach his destination . how many miles did john drive ?

Answer: 225 miles .


Question: Problem: a 70 kg metal bar made of alloy of tin and silver lost 7 kg of its weight in the water . 10 kg of tin loses 1.375 kg in the water ; 5 kg of silver loses 0.375 kg . what is the ratio of tin to silver in the bar ?

Answer:
2 /