Question

Two taps A and B can fill a cistern in 20 and 30 minif both are opend simultaneously how long will it take to fill the cistern

Answer 1

it would take roughly 6 and a half minutes i think

Answer 2

I believe it’s 12 minutes since the since the time is unknown, you set it up as x/20+x/30 since you know that they are being added. Filling up the canteen is 1 because you want it full all the way so you find the common denominator and solve for the x which is 12