Question
A train travelling at a uniform speed, clears a platform
240 meters long in 10 seconds and passes a telegraph post in 6 seconds. Find the length of the train and its speedSolution
Let the speed of the train be x m/sec and the length of the train be y m, then According to the question x = (240 + y) / 10 ----(1)  x = y / 6 ----(2) From equation (1) and equation (2)  y / 6 = (240 + y) / 10 2y = 1400 + 6y  10y - 6y = 1440  y = 1440/4 =360m The length of the train is 360 m From equation (2) x = 360/6  x = 60 m/sec  x = 60 x 18/5 x = 216 km/hr The speed of a train is 216 km/hr.
In which of the following models, price  is driven down to marginal cost?
In the context of economic growth models, which of the following statements best describes "Disembodied Technical Change"?
Market failure is the inability of
Elistan can produce either 5 monster trucks or 10 cans of silly string in a day. What is the opportunity cost of one can of silly string?
 Which theorem intends to show that the change in commodity prices changes the distribution of real incomes between capital and labor?
Within the AD-AS model, a phenomenon known as stagflation is best represented by a shift in which curve, and with what consequence for the short-run equ...
Consider A’s utility function to be U(x,y)=(min{X,Y})1/2, the price of good X is Rs.2 and price of good Y is Rs.1. Calculate the total Util...
Which of the following is a possible change in total revenue that occurs if you increase the price of a good with unit elasticity?
Relevant for Exams:
