Question

A can do a piece of work in 15 days while B can do it in 10 days. How long will they take together to do it ​

Answer 1

Answer:

I hope it's help you.

Step-by-step explanation:

first we need to find total work:

Total work=lcm(10,15)=30 unit

Efficiency of A & B

A can do work in 10 days,so the efficiency of A=30/10=3 unit(per day).

B can do the work in 15 days ,so the efficiency of B =30/15=2.unit (per day)

If both together work then add the efficiency of A &B >A+B=5 unit work per day

Half work=30/2=15unit

Now,

No. of days for complete the work=15/5=3 days