Question

Anu can paint the room in 2hrs and her sister can paint it in 4hrs.How long it take if they work​

Answer 1

Answer:

4/3 hrs

Step-by-step explanation:

Anu takes 2hr

Sister takes 4hr

per hr work of both is 1/2 & 1/4

now both work together

A+S = 1/2+1/4 for per hr work done

= 6/8 = 3/4

They both can complete 3/4 work in 1hr

So total hrs taken will be inverse of above

they take 4/3hrs to paint together