Question

help me to answer this​

Answer 1

Answer:

10 & 15 LCM = 30

efficency = 3 & 2 (of P & Q)

now,

let both did work for X days and than P left,

A/q,

5x + 3*5 = 30

5x = 30-15

5x = 15

x = 3 days (Ans)

(Mark as brainlist)

Answer 2

Answer:

refer to this attachment