Answer:B)
Explanation:
A) 2 hours 30 mins
B) 2 hours 45 mins
C) 3 hours 30 mins
D) 3 hours 45 mins
Answer:D) 3 hours 45 mins
Explanation:
Half tank will be filled in 3 hours Lets calculate remaining half,
A) 2.8 min
B) 4.2 min
C) 4.8 min
D) 5.6 min
Answer:C) 4.8 min
Explanation:
A)5 min.
B)9 min.
C)10 min.
D)15 min.
Answer:B)9 min.
Explanation:
Let B be turned off after x minutes. Then,
Part filled by (A + B) in x min. + Part filled by A in (30 -x) min. = 1.