Question

A is thrice as efficient as B and is, therefore, able to finish a piece of work in 10 days earlier than B. In how many days A and B will finish together ​

Answer 1

Answer:

So A and B can finish work in 15/4 days

=3 +3/4 days

Step-by-step explanation:

A=3B

let B finished work in x days

so B's one day's work = 1/x

A finishes the work in x-10 days

so A's one day's work=1/(x-10)

given 1/x-10=3/x

x=3x-30

2x=30

x=15

Thus B's' one day work=1/15

and A's one days work=3/15

A+ B 's one day's work

=1/15+3/15

=4/15

So A and B can finishi work in 15/4 days

=3 +3/4 days