Question
A boat, whose speed in still water is 25% more than the
speed of the current, covers 810 km downstream in _____ hours. The speed of the boat in still water is ______ km. The values given in which of the following options will fill the blanks in the same order in which is it given to make the statement true: I. 10, 45 II. 15, 30 III. 12, 35.7Solution
Let, the speed of the current be x km/hr Therefore, speed of the boat in still water = 1.25x km/hr Downstream speed of the boat = x + 1.25x = 2.25x km/hr For I: 2.25x = 810/10 => 2.25x = 81 => x = 36 Therefore, speed of boat in still water = 1.25x = 45 km/hr Therefore, I is True. For II: 2.25x = 810/15 => 2.25x = 54 => x = 24 Therefore, speed of boat in still water = 1.25x = 30 km/hr Therefore, II is true. For III: 2.25x = 810/12 => 2.25x = 67.5 => x = 30 Therefore, speed of the boat in still water = 1.25x = 37.5 km/hr Therefore, III is false.
Commodity X and Y have an equal price elasticity of supply. The supply of X rises from 400 units to 500 units due to a 20 percent rise in its price. Cal...
If the money supply grows 5 per cent, and real output grows 2 per cent, prices should rise by
Inflation Figures (Aug/Sept 2025): What was the approximate year-on-year inflation rate for the Consumer Price Index (CPI) and the Wholesale Price Index...
If rxy = 0.75, then ryx will be:
From the information provided in the following table, calculate the GNPmp
If you have found the percentage of the value of sales accounted for by the four largest firms in an industry, you have found the
The theory of purchasing power parity says that       .
Market failure is the inability of
According to the Romer model, if the stock of ideas increases by 15 %, how much will output per worker increase when all else is equal?
...
Relevant for Exams:
