Question

A and B together can dive a trench in 12 days . which an alone dive in 30 days in how long B can burrow it​

Answer 1

Step-by-step explanation:

A's 1 day work= 1/8, B`s 1 day work = 1/10

∴ (A+B) 1 day work = (1/8+1/10) = 9/40

Both cooperating can complete it in 40/9 days.

I HOPE IT WILL HELP YOU PLEASE FOLLOW, THANK AND MARK ME AS BRAINLIST

Answer 2

Step-by-step explanation:

as 1 Day work= 1/8,B's 1 Day work= 1/10

therefore (A+B) 1 Day work=✓(1/8+1/10)= 9/40

both cooperating can complete it in 40/9 days

1. hope it will help you ❣️
2. if you like it so please follow me
3. you can take help from me anytime....