Question

pipe a and b can fill a tank in 12 and 16 min respectively. if both pipe are kept open for x min and then b is closed and a fills the rest of tank in 5min. the value of x is​

Answer 1

Answer:

4

Step-by-step explanation:

pipe A=1/12 and pipe B=1/16

together they can fill tank in

1/12+1/16=7/48

but both were opened for only X mins

therefore 7x/48 and a fills rest tank i.e 5/12

7x/48+5/12=1 (it is equated to 1 to show completion of work)

7x+20=48

X=4mins