Question

Acomplete a work at four times the speed then C . if together they can complete a work in 20 days in how many days can A alone complete it​.

Answer 1

Answer:

25days

Step-by-step explanation:

let effeciency of C = 1/x

=> effeciency of A = 4/x

Given,

combined effeciency of A &C = 1/20

=> 1/x + 4/x  = 1/20

=> 5/x = 1/20

=> x =5*20 = 100

=> effeciency of C = 1/100

and effeciency of A = 4/100 = 1/25

=> A alone can complete the given work in 25 days