Q. 23.7( 13 Votes )
If 15 workers can build a wall in 48 hours, how many workers will be required to do the same work in 30 hours?
Answer :
The number of workers building a wall and time taken by them is inversely proportional.
Let x be the number of workers and y be the time taken.
(k is constant) (1)
Number of workers given=15
Time took =48 hrs
(Put in 1)
Wall has to be built in 30 hours
So, 
(Put in 1)
(Since
)
So, 24 workers are needed to build the wall in 30 hours.
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PREVIOUSWhich of the following statements is of inverse variation?(1) The number of workers on a job and time taken by them to complete the job.(2) The number of pipes of the same size to fill a tank and the time taken by them to fill the tank.(3) Petrol filled in the tank of a vehicle and its cost.(4) Area of the circle and its radius.NEXT120 bags of half liter milk can be filled by a machine within 3 minutes find the time to fill such 1800 bags?
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120 bags of half liter milk can be filled by a machine within 3 minutes find the time to fill such 1800 bags?
MHB - Mathematics (New)
