Question
A, B and C are three pipes connected to a tank. A and B
together fill the tank in 15 hrs. B and C together fill the tank in 20 hrs. A and C together fill the tank in 30 hrs. In how much time will B alone fill the tank?Solution
A + B fill in 15 hrs B + C fill in 20 hrs A + C fill in 30 hrs ⇒ 2 (A + B+ C) fill in (15 × 20 × 30)/(30 × 20 + 15 × 30 + 15 ×20) = 20/3 hours ∴ A + B + C fill the tank in 40/3 hours Now, C = (A + B+ C) – (B + C) ] fills in 3/40 - 1/15 = 1/120 or 120 hours Similarly, A fills in 3/40 - 1/20 = 1/40 or 40 hours And B fills in 3/40 - 1/30 = 1/24 or 24 hours
If all the letters in the word ‘UNDERGROUND’ are arranged in alphabetical order from left to right such that the vowels are arranged first followed ...
Which of the following Colour is liked by G?
Who among the following person sits second to the right of M?
What is the position of P with respect to the person who paid Rs. 550?
Which of the following is true?
Who likes Star Maa channel?
What is the position of E with respect to D?
Read the directions carefully and answer the following question.
Six people, R, S, T, U, V and W are sitting around a circular table facing to...
Statements:
B ≥ L = C; N ≤ L < O; Q ≥ N < R
Conclusions:
I. B > N
II. N = B
Who sits second to the right of Z?
Relevant for Exams:
