In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Q: Problem: a number increased by 20 % gives 480 . the number is ? 
Options: a ) 200 , b ) 300 , c ) 400 , d ) 500 , e ) 600

A: c
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Q: Problem: a man walking at a rate of 15 km / hr crosses a bridge in 10 minutes . the length of the bridge is ? 
Options: a ) 500 m , b ) 1110 m , c ) 950 m , d ) 1000 m , e ) 1300 m

A: a
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Q: Problem: a sum of rs . 2678 is lent into two parts so that the interest on the first part for 8 years at 3 % per annum may be equal to the interest on the second part for 3 years at 5 % per annum . find the second sum ? 
Options: a ) 1629 , b ) 1648 , c ) 2677 , d ) 2986 , e ) 2679

A:
b
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