Question

A tank can be filled by one pipe in 45 minutes and by another in 55 minutes. How long will it take both to fill it?

Answer 1

does x = time required for both pipes to fill tank?

Answer 2

x = 24 1/3

Answer 3

thanks for the help MSFFL

Answer 4

I'd give you a badge but it isn't letting me! Which is strange

Answer 5

1/t = 1/55 + 1/45
= (9 + 11)/ 495
=> t = 495/ 20 = 24. 75 = 24min 45 sec