Motor boat covers a certain distance downstream in 5 hours. It covers the same distance upstream in 7(1/2) hour. If the speed of the water is 4.5 km/hr, then the speed of the boat in still water is:
Let the distance be ‘D’ km According to the question, Downstream speed x + y = d/5 or d = 5 (x+y) .......... (i) Upstream speed x-y = (d×2)/15 or d = (15(x-y))/2 ........... (ii) Comparing (i) & (ii) 5 (x+y) = (15(x-y))/2  10(x+y) = 15(x-y) 2(x+y) = 3(x-y) 2x + 2y = 3x - 3x x = 5y Hence, y = Speed of the current = 4.5 km/hour. Speed of boat, x = 5 × 4.5 = 22.5 km/hr
Which one of the following will come in third place when arranged in Alphabetical order?
Statements:
All bold are cowards.
No bold is a tall.
Some tall are short.
Conclusions:
I. Some cowards are not...
Which of the given options would be a logical sequence of the following words?
1. Decameter
2. Millimeter
3. Hectometer
4. Centimeter
5. Decimeter
By rearranging the letters of ‘NADORUYB’, we get an English meaningful word of eight letters. The obtained word is ______.
1Â Â Â Â Â Â Â Â Â...
Arrange the following words in a meaningful order.
A. Troposphere B. Stratosphere C. Exosphere D. Thermosphere E. Mesosphere
...In a code language, THROUGH is written as IHVPSIU. How will PATRICK be written as in that language?
A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
W, V, T, Q, M ?
In the following figure, square represents Doctor, triangle represents Lawyer, circle represents Teachers and rectangle represents Indians. Which of set...
Three of the following four number-pairs are alike in a certain way and one is different. Pick the odd number-pair out.
Three of the following four number-pairs are alike in a certain way and one is different. Find the odd one out.
