Gmate Exam Category

if a and b fills a tank in 10 and 12 hours respectively and c can empty tank in 20 hours howmuch time does three tank take to fill the tank

Read Solution (Total 3)

1/10+1/12-1/20=2/15
8 years agoHelpfull: Yes(2) No(0)

1/10+ 1/12-1/20= 2/15
8 years agoHelpfull: Yes(0) No(0)
1 hr work - 11L filled 3L drained out = Net work 8L
Total work 60
Total time will be 60/8 = 15/2 hrs
5 years agoHelpfull: Yes(0) No(0)

Gmate Other Question

Supriya runs a marathon race in 50 minutes at an average speed of 48 km/hrs . in order to set a national record she needs to win the race in 40 minutes considering that her speed remains constant at what minimum speed should she run to set the record? A shopkeeper has 13 washing machines out of which 5 are defective. A customer buys 3 washing machine. What is the probability that exactly one machine is defective?
(a) 1/20 (b) 1/5 (c) 70/143 (d) 35/143