Page 48 - Arithmetic

Exercise
1. Three pipes P, Q, and R can fill a tank in 40 minutes, 24 minutes, and 20 minutes respectively. When the pipes are opened, they discharge different chemicals U, V, and W, respectively. After 4 minutes, find the proportion of chemical V in the tank.
a) 7 b) 15 90 7
c) 7 d)21 15 5
e) 5 14
2. Pipe L can fill a tank in 24 minutes, whereas M can fill a tank in 30 minutes. The operator opens both L and M together, but after 4 minutes, pipe L is turned off accidentally. Find the time it will take to fill the tank completely?
a) 21 minutes b) 28 minutes c) 10 minutes d) 35 minutes e) 12 minutes
3. Pipe U can fill a reservoir in 30 hours, and Pipe V can do it in 50 hours. Another pipe ‘W’ can empty the tank in 25 hours. All three pipes work together, and W is closed after 10 hours. Find the time taken to fill the remaining tank?
a) 65 hours b) 75 hours 77
c) 60 hours d) 65 hours 4
e)75 hours
4. The stations of two cities A and B in Texas are 265 miles apart. A superfast train starts from A at 12 noon and travels at 40 miles per hour. Another train starts from B at 1 p.m. and travels toward A at 35 miles per hour. At what time will the trains meet each other?
a) 2 p.m. b) 2.30 p.m. c) 4 p.m. d) 6.15 p.m. e) They will never meet
5. Travis leaves from his home in city A to his college in city B at 4.50 p.m. He drives at a speed of 54 miles per hour for 1 hour 10 minutes. After that he reduces the speed to 40 miles per hour. If the distance between his home and the college is 319 miles, when will Travis reach his college?
a) 11.14 a.m. b) 11.14 p.m. c) 12.24 p.m. d) 10.15 p.m. e) 12.24 a.m.
Page 47 of 55
Arithmetic Concept