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- x2 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
Which of the following is not an external aid to construction?
As per the IRDA Act, 1999 the Authority shall maintain proper accounts and other relevant records and prepare an annual statement of accounts in such fo...
No company other than a banking company shall use as part of its name or, in connection with its business nor shall any company carry on the business of...
How many members are present in Pension Fund Regulatory and Development Authority?
According to Sales of Goods Act, 1930 Where there is an unconditional contract for the sale of specific goods in a deliverable state,
According to Sales of Goods Act, 1930. Where a contract of sale is not severable and the buyer has accepted the goods or part thereof
Mark the correct sequence of stages in a crime:
Who is the ex-officio chairman of the Council of States?
Which case is the pioneer in the History of PILs?
In a criminal case, the primary burden of proof is upon