Question

if one man is doing a work in 4 days and other one is doing it in 8 days how much day they need to complete the same work​

Answer 1

Answer:

working together, they can complete the work in 8/3 days

Step-by-step explanation:

one man can do work in 4 days

other can do same work in 8 days

if they work together , they will take X days

ie

$\frac{1}{4} + \frac{1}{8} = \frac{1}{x} \\ = \frac{2 + 1}{8} = \frac{1}{x} \\ x = \frac{8}{3}$

they can complete the work in 8/3 days

Answer 2

Answer:  =2.666667 days

Step-by-step explanation: Firstly we will find 1 day work of both A and B, then by adding we can get collective days for them,

So,

A's 1 day work = 1/4

B's 1 day work = 1/8

(A+B)'s 1 day work =

(1/4+1/8)

(2/8+1/8)

(3/8)

So together they can complete work in 2.666667 days.