Question

A can do a piece of work in 20 days while B can do in 12 days ,B worked it for 9 days , A can finiah the remaining work in?​

Answer 1

Answer:

5 days.

Step-by-step explanation:

Part of work completed by B = 9/12 = 3/4.

Left over part of work = 1 - 3/4 = 1/4.

For 1 whole work A takes 20d, for 1/4th part of work we will need to find how many days he takes.

1 : 1/4 : : 20 : x

//product of means = product of extremes

1*x = 1/4*20

x = 5

So A will take 5 days to complete remaining work.