Question
Pipe ‘P’ alone can fill a tank in 12 minutes. If pipes
‘P’ and ‘Q’ are operated together, they fill the tank in 16 minutes. Find the time taken by pipe ‘Q’ alone to empty 75% of the tank.Solution
ATQ,
Let the total capacity of the container = L.C.M of 20 and 25 = 100 units
So, efficiency of pipe 'X' alone = 100 ÷ 20 = 5 units/minute
Combined efficiency of pipes 'X' and 'Y' = 100 ÷ 25 = 4 units/minute
So, efficiency of pipe 'Y' alone = 4 - 5 = -1 unit/minute (outlet)
So, time taken by pipe 'Y' alone to empty 60% of the container = (100 × 0.6) ÷ 1 = 60 minutes
___________ refers to the degree of correlation of the same variables between two successive time intervals
Let X and Y be two related variables. The two regression lines are given by x-y+1=0 and 2x-y+4=0. The two regression lines pass through the point:
When we say that the estimator is BLUE. What does best signify here?
If bxy = 0.20 and rxy = 0.50, then byx is equal to:
Which of all the following is not an assumption of Marshall Consumer Theory of Demand?
Umar has the utility function U(b,w) = min (b,w) and Akshat has the utility function U(b,w) = bw. If we draw an Edgeworth box with b on the ho...
The sum of squared deviation is minimum when taken from
For a positively sloped LM curve, which of the following statements is CORRECT?
Autocorrelated errors is about