Q: 135 (IAS/1998)

If 15 pumps of equal capacity can fill a tank in 7 days, then how many extra pumps will be required to fill the tank in 5 days?
question_subject: 
Maths
question_year: 
1998
question_exam: 
IAS
question_sub_subject: 
Mathematics
question_topic: 
Mathematics
stats: 
0,136,192,136,64,80,48