Question

a cistern can be filled by one tap in 2 whole 1/2 hours and by another in 3 whole 3/4 hours. how long will cistern take to fill if they are opened together?

Answer 1

Answer:

Step-by-step explanation:

A will fill the tank in 2.5 hours

B will fill the tank in 3.75 hours

A+B opened together will fill in

1/2.5 + 1/3.75 = 1.488 hours

shortcut method is

using equation

xy/x+y

2.5*3.75 /(2.5+3.75) = 9.375/6.25 = 1.488 hours

Answer 2

Answer:

bhai mujhe tho khud! ahi pata mai tho kudh dhund raha tha pr itnaa }ata hai ki jis ne answer diya hai usska answer galt hai