Question

one tap fills a bath tub in 12 minutes and another tap fills it in 15 minutes. The waste pipe can empty the bath tub in 10 minutes .In what time will the bath tub be filled if both the taps are turned on and if the waste pipe has been left open accidentally

Answer 1

for tap 1st
work done in 1 min = 1/12 part of work
for tap 2nf
work done in 1 min = 1/15 part of work
for tap 3rd
work done in 1 min = -1/10 part of work
work done in 1 min together tap = 1/12+1/15-1/10
= (5+4-6)÷60
= (9-6)÷60
= 3÷60
= 1/20 part of work
hence require time for fill tank 20 min
**** mark as brilliant ans****

Answer 2

Answer:

20min

Step-by-step explanation:

first tap filled=1/12min

second tap filled= 1/15min

third tap =-1/10min

bath be filled if both taps are turned on = 1/12+1/15-1/10

=(5+4-6)60

=20minute