Upstream speed = 259/7 = 37 km/h Downstream speed = 477/9 = 53 km/h Speed of boat in still water = (37 + 53)/2 = 45 km/h Speed of stream = (53 – 37)/2 = 8 km/h Increased speed of boat in still water = 45 + 4 = 49 km/h Decreased speed of stream = 8 – 2 = 6 km/h Required time taken = 645/(49 – 6) + 660/(49 + 6) = 15 + 12 = 27 hours
Which type of mirror is used by dentists to see large images of patients' teeth?
Compressed natural gas (CNG) is a fuel gas made of petrol and it is mainly composed of which gas?
Of the units mentioned in the options, which one is the largest as compared to the others?
India's poverty percentage decreased from 55.1% to how much from 2005to 2019-20 in the multidimensional poverty index?
The ______ was nationalised in the year 1949.
With reference to abundant elements in Earth's Crust, which among the following is the most abundant metal in the earth's crust?
The President of India decides on the question as to the disqualification of Members of Parliament in consultation with the ________.
What role does a compiler serve in computer programming?
Who is the author of the book 'Why I Am a Hindu'?
The cells having well – organised nucleus with a nuclear membrane are designated as ___
