Question

If 15 workers can build a wall in 48 hours. How many workers will be required to do same work in 30 hours

Answer 1

Answer:

case of inverse variation

xy=k

48×15=720

1).x=30

2).y =b

xy=k

30×b=720

b=720÷30

=24

Answer 2

↦Solution : -

Let the number of workers employed to build the wall in 30 hour = x

Now ,

Number of hours = 48⠀⠀, 30

Number of Workers = 15⠀⠀, x

So ,

48 × 15 = 30 × x

48×15/30 = y

y = 24

Therefore , 24 workers are needed to finish the work in 30 hours ..