Question

A tap can empty a tank in 20 hours while another tap can empty it in 15 hours. If both taps are open simultaneously, how long will it take to empty the full tank?
a. 7(4/7)
b.6(4/7)
c.8(4/7)
d.9(4/7)

Answer 1

Answer:

please rewrite the question

Answer 2

Answer:

A7(4/7)

Step-by-step explanation:

thats the and i think