Question
Speed of a boat in still water to speed of boat in
upstream is 11:7. If the boat can travel 300 km in downstream in 5 hours, then find the time taken by the boat to cover 22 km in still water.Solution
Let speed of boat in still water and speed of boat in upstream be ‘11x’ km/h and ‘7x’ km/h, respectively. Speed of stream = 11x – 7x = 4x km/h Speed of boat in downstream = 11x + 4x = 15x km/h So, 15x = 300/5 = 60 Or, x = 4 Speed of boat in still water = 11 × 4 = 44 km/h Desired time = 22/44 = 30 minutes
While calculating Pearson's correlation coefficient, the following values are obtained for 25 pairs of observations. It was later discovered that two pa...
When the price of a commodity decreases, and its demand curve forms a rectangular hyperbola, what happens to the total expenditure on that commodity?
For a frequency distribution if Coefficient of variation is 5, standard deviation is 2 and Karl Pearson’s coefficient of skewness is 0.5, the value of...
The government provides public goods because
In which of the following market structure Quantity is maximum?
The Fisher Effect assumes that the    Â
The costs of inflation are?
Which of the following Herfindahl-Hirschman Index is most consistent with monopoly?
The fiscal deficit is the difference between the government’s total expenditure and its total receipts excluding ______
Relevant for Exams:
