Let the capacity of the cistern = 60 units Then, efficiency of pipe ‘A’ = 60/30 = 2 units/minute Efficiency of pipe ‘B’ = 60/10 = 6 units/minute Efficiency of pipe ‘C’ = 60/12 = 5 units/minute So, combined efficiency of pipes ‘A’, ‘B’ and ‘C’ = 2 + 6 – 5 = 3 units/minute 50% of the cistern’s capacity = 30 units Therefore, time taken by all 3 pipes together to fill 50% of the cistern = 30/3 = 10 minutes
Eight people F, H, K, N, P, S, V, X are sitting in a straight line and all are facing north.
Neither F nor H sit at any of the extreme ends of th...
After arranging the given words according to dictionary order, which word will come at Third position?
1. Petrol
2. Petrify
...
Of the following two statements, both of which cannot be true, both can also be false. Which are these two statements?
I. All machines make noise...
What should come in place of? in the given series based on the English alphabetical order?
BLS, FJQ, JHO, NFM, ?
Complete the following series.
Z1, Y4, X9, ______
If A = 26 and T = 7, then AUTHENTIC = ?
Raman and his sister Shikha study in the same class. Raman's rank in an examination is 11th from the bottom and Shikha's rank in the same examination is...
Statements: Some leaves are old. All old are clothes. Some clothes are papers.
Conclusion I: All leaves are old.
Conclusion II: Some old are clothes.
Five persons, F, J, N, R and V, are sitting around a circular table facing towards the centre (not necessarily in the same order). J is to the immediate...
If – means multiplication, × means division, ÷ means addition, and + means subtraction, then what is the value of the following expression?
2...
