A and B together can fill a ditch in 30 days while A alone can fill it in 50 days. If B does the work for only half a day daily how long will it take to fill the ditch by A and B?
Correct answer C. 75/2 days
Correct answer C. 75/2 days
Tip: press A, B, C or D to answer, and N for the next question.
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