Question
A man can go on a motor boat with a speed of 15 km/hour
in still water to a certain upstream point and come back to the starting point in a river which flows at a speed of 5km/hour. Find the average speed of motor boat for total journey?Solution
Let, the speed of boat be b km/hour and speed of current be s km/hour Average speed = 2xy/(x+y) (here, x is speed of downstream and y is speed of upstream)               = (2 (b+s)(b-s))/((b+s+b-s))               = (b2 - s2)/b               = (225 - 25)/15 = 200/15 = (40/3) km/hour Alternate Method :- 
Average speed = (Total distance covered)/(total time taken)               = (2×60)/9 = 120 /9 = 40/3 kmph
Choose the word/group of words which is most similar in meaning to the word/group of words printed in bold as used in the passage.
Scalable
...Which of the following is a near synonym of the word ‘prognosticate’?
Why did the other judges possibly revolt against the CJI according to the passage?
Why according to the passage, the list of foreigners is feared to increase?
What happened to the cat?
CONSENSUS
What was the timespan of the revolutionary period in Germany?
What is true about the device being made by the engineering researchers at California NanoSystems Institute?
After reading the passage carefully,complete the following sentence:-
 It is true that rupee and Nifty derivatives are________________.Â
What did the couple do after six months?
