Question

Shilpa can stitch a shirt in 5 hours,while alka can do it in 4 hours.How much time would they take to stitch 36 shirts if they work together

Answer 1

Answer:

80 hours are needed to stitch 36 shirts together by alka and shilpa

Answer 2

Answer:

80 hours

Step-by-step explanation:

Shilpa's 1 hour work = 1/5

Alka's 1 hour work = 1/4

(Shilpa + Alka)'s 1 hour work = 1/5 + 1/4

=4+5/20 (L.C.M of 4 and 5 = 20)

=9/20

Therefore, they take 20/9 hours to do 1 work (make 1 shirt)

(Time = Reciprocal of work)

Let the time required be x

For Shilpa and alka's work:

Time taken Work done

Time taken Work done (in hours) (shirts stitched)

20/9 1

x. 36

Therefore, time required (x) = 20/9 × 36

= 20 × 4

= 80 Hours