Question
Pipe βAβ can fill a tank in 30 hours whereas leak
βAβ can empty it in 45 hours. If they both operate along with pipe βBβ, then the given tank gets filled in 20 hours. How much time is needed to fill the given tank if pipe βBβ and leak βAβ work together?Β ΒSolution
Let the capacity of the tank be 90 litres {LCM (30 and 45)} Efficiency of pipe βAβ = 90 Γ· 30 = 3 litres/hour Efficiency of leak βAβ = 90 Γ· 45 = 2 litres/hour Combined efficiency of pipe βAβ and leak βAβ = 3 β 2 = 1 litre/hour Combined efficiency of pipe βAβ, βBβ and leak βAβ = 90 Γ· 20 = 4.5 units/hour Efficiency of pipe βBβ = 4.5 β 1 = 3.5 units/hour Time taken by pipe βBβ and leak βAβ to fill the tank = 90 Γ· (3.5 β 2) = 60 hours
For any given price, a firm in a competitive market will maximize profit by selecting the level of output at which price intersects the
Type II error occurs when
Autocorrelated errors is about
Endogenity is associated with which of the following ?
Money multiplier equals:
In a perfectly competitive market, a firmβs long run supply curve is
For n=100, given that the regression of X on Y is 4Y-6X+240 = 0 The mean of Y=100 and variance of X is 4/9 times the variance of Y. Calculate the coeffi...
Consider the following:
Statement 1: There exists an inverse relationship between market rates of interest and price of bond
Statement 2: ...
If r xy = 0, then:
Claudia would be willing to pay as much as $100 per week to have her house cleaned. John's opportunity cost of cleaning Claudia’s house is $70 per...