Question

plzz ans this Q and write the correct ans plzz and ans in step by step. ch. is unitary method​

Answer 1

Answer:

Joseph can do a work in 20 hours

Peter can do the same work in 25 hours

Now Joseph’s 1 hour’s work = 1/20

And Peter’s 1 hour’s work = 1/25

Both’s 1 hour’s work = 1/20 + 1/25

= (5 + 4)/100

= 9/100

(i)

Both’s 4 hours work = 9/100 × 4 = 9/25

(ii)

Work left = 1 – 9/25

= (25 – 9)/25

= 16/25

(iii)

Peter can do 16/25 work in = 25 × 16/25

hope it helps!❣️❣️

= 16 hours