Explanation:

Explanation – Ismail completes work in = 25 days
Kachara completes work in = 20 days
Bagha is 300% more efficient than Lakha, so we can find that in how many days Bagha can complete this work.
(100 + 300)% of Bagha = Lakha
from the table we can calculate that Lakha can complete the whole work in 32 days
400% of Bagha = 32 ( number of days in which Lakha can complete the work)
Bagha = (32/400) × 100
= 8 days
Total work = LCM ( Ismail, Kachara and Bagha)
= LCM ( 25, 20 , 8)
= 200 unit
Now we can find efficiency of each persons.
Ismail = 8 unit
Kachara = 10 unit
Bagha = 25 unit
Ismail did only 25% of total work i.e. 50 unit
No. of days Ismail took to complete 25% work = 50 / 8
= 25/4 days
No. of days Kachara works = 25/4 days ( said in question)
Work done by Kachara = 10 × (25/4)
= 125/2 unit
Remaining work = 200 – ( 50 + 125/2)
= 175 / 2 unit
Remaining work done by Bagha
= (175/2) / 25
= 175/50
= 7/2 days
Total work completes in  = (25/4)  + (25/4)  + (7/2)
= 32/2
= 16 days