Question
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:Solution
Let the distance be âDâ km According to the question, Downstream speed x + y = d/5 or d = 5 (x+y) .......... (i) Upstream speed x-y = (dĂ2)/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 Ă 4.5 = 22.5 km/hr
Select the incorrectly spelt word.
An ornament fastened to clothing with a hinged pin
Choose the word with the correct spelling:
Select the most appropriate synonym of the given word.
Caustic
15. Vivacious
...Select the most appropriate synonym of the given word.
DETAIN
Choose the word similar in meaning to the given word:
Ephemeral
Find the word with the appropriate similar meaning of the word in Italic from the options given:
The movie had a riveting plot that kept everyo...
- Select the most appropriate synonym of the bracketed word in the following sentence to fill in the blank.
The speakerâs words had a deeply ______... You have sufficient time to complete the question paper.
Relevant for Exams:
