Let the speed of upstream be x km/hr Speed of downstream = y km/hr 12/x+20/y= 4 ………….(i) 20/x+12/y=4 1/2…………………….(ii) Adding (i) and (ii), we get 32(1/x+1/y)=17/2…………..(iii) Subtract (i) from (ii), we get 8(1/x-1/y)=1/2…………..(iv) Adding (iii) and (iv), we get 2/x=17/64+ 1/16 2/x = 21/64 x = 128/21 km/hr Now, 21/128 - 1/y = 1/16 y = 128/13 km/hr Now, rate of current = 1/2(128/13-128/21) =1.8 Km/hr
RBI introduced Rs _______ banknote in Mahatma Ganghi (new) series.
Who among the following Chief Justices of India ordered the constitution of a Special Bench called the 'Social Justice Bench'?
What is a Green Index?
Which of the following is correct regarding Giffen goods?
What does it mean when the economy experiences hyperinflation?
General sales tax is a form of:
..."ILO Conference No. 87" sometimes seen in the news is related to which of the following?
FDI in insurance sector in India is allowed till what extent ?
Which of the following is a measure of inflation?
According to the Trade Union Act 1926, Who needs to sign the notice of dissolution if a Trade Union decides to dissolve?
