Question
Speed of a boat in still water to speed of boat in
upstream is 10:7. If the boat can travel 390 km in downstream in 5 hours, then find the time taken by the boat to cover 18 km in still water.Solution
Let speed of boat in still water and speed of boat in upstream be β10xβ km/h and β7xβ km/h, respectively. Speed of stream = 10x β 7x = 3x km/h Speed of boat in downstream = 10x + 3x = 13x km/h So, 13x = 390/5 = 78 Or, x = 6 Speed of boat in still water = 10 Γ 6 = 60 km/h Desired time = 18/60 = 18 minutes
Choose the one which best expresses the meaning of the given word .
Ingenuous
Select the most appropriate meaning of the following idiom-
ROLL OUT
Poignant
That cannot be taken away
15. Vivacious
...In each of the following questions, three out of four words given have the same meaning. Mark the number as your answer which is different in ...
Select the INCORRECTLY spelt word.
- Choose the alternative which can replace the bold word without changing the meaning of the sentence.
The scientist was exultant after his years of ... Select the most appropriate synonym of the given word
Profuse
- Select the most appropriate ANTONYM of the bold word.
She was very apprehensive about the results of her exam.