Basic Maths Mcqs
Q. Two pipes P and Q can fill a cistern in 12 min. and 15 min. respectively but a third pipe ‘R’ can empty the full tank in 6 min. P and Q are kept open for 5 min. in the beginning and then ‘R’ is also opened. In what time is the cistern emptied ?
a. 30 min
b. 35 min
c. 40 min
d. 45 min
No explanation is available for this question!
