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QID : 63 - Meghnad can do a piece of work in 45 hours. If he is joined by Jayshri, who is 50% more efficient, in what time will they together finish the work? 

Asked by aryap7964 8th December 2017, 7:06 PM
Answered by Expert
Answer:
begin mathsize 16px style part space of space work space done space by space straight M space in space 1 space hr equals 1 over 45
straight M space takes space 45 space hours
Since space straight J space is space 50 percent sign space more space efficient space than space straight M. space
So space this space implies space that space straight M space takes space 50 percent sign space more space time space than space straight J
45 equals 150 over 100 cross times time space of space straight J
then space straight J space will space take space time equals 30 space hrs
part space of space work space done space by space straight j space in space 1 space hr equals 1 over 30
together space in space one space hour
1 over 45 plus 1 over 30 equals 1 over 18
so space together space they space will space complete space the space work space in space 18 space hrs end style
Answered by Expert 13th December 2017, 6:35 PM
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