Question
A motor boat goes downstream from point A to B ,which
is 36 km away from point A, and then returns to A.If actual speed of the boat in still water is 7km/hour ,and the total upstream and downstream journey takes 21 hours .What must be the actual speed of boat for the journey from A to B to take exactly 108 minutes ?Solution
Speed of boat in still water is 7km/hour  Let the Speed of Stream be x Km/hour 36/(7+x) + 36/(7-x) = 21 24 = 49- x^2 x = 5 km/hour Now, the speed of Boat for the journey from A to B to take time 108 minutes is  Speed of boat = y km/hour  , Speed of stream =5km/hour , Time = 108 minutes (y+5) = (36×60)/108       = 20km/hour  y+5 = 20   y = 15km/hour ∴ Speed of Boat must be 15km/hour
In the following question, a sentence is given, divided into four parts (A), (B), (C) and (D). The error, if any, will only be in TWO PHRASES/PARTS of t...
In the following questions, each sentence is divided into four parts, which are labelled a, b, c, and d, one of these parts may contain an error. If th...
Read the following sentence to find out whether there is any grammatical mistake/error or idiomatic error in it. The error, if any, will be in one part ...
With the progress of the monsoon and the memory of the extreme heat far behind us, we risk ignoring a critical warning.
While standoffs between India and China along (A)/ the LAC have occurred in the past, the most significant
Aditi had topped the class 1)/ and was also the most brightest 2)/ student of her class 3) as well as the complete science section 4)/ No Error.
Each sentence below is divided into five parts (a), (b), (c), (d), and (e). Identify the part that contains the error. If there is no error, choose opt...
Even if this action did not violate the letter of the anti-defection legislation , the Chairman of the Rajya Sabha could have considered weather it mil...
- Read each sentence to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. Mark the part with the...
Read the given sentence to find out whether there will be error in any of the two parts, mark the parts in which there will be error as answer from the ...
