Question
Speed of a boat in still water to speed of boat in
upstream is 7: 6. If the boat can travel 320 km in downstream in 4 hours, then find the time taken by the boat to cover 21 km in still water.Solution
Let speed of boat in still water and speed of boat in upstream be ‘7x’ km/h and ‘6x’ km/h, respectively. Speed of stream = 7x – 6x = x km/h Speed of boat in downstream = 7x + x = 8x km/h So, 8x = 320/4 => x = 10 Speed of boat in still water = 7 × 10 = 70 km/h Desired time = 21/70 x 60 = 18 minutes
The national song ‘Vande Mataram’ was composed by Bankim Chandra Chatterjee i n which language?
Which of the following seas has highest salinity in the world?
The missing term of the series isÂ
A2, C5, E8, G11, ____________
Which amongst the following statements is/are not correct ?
1.     Isthmus is a narrow strip of land joining two landmasses.
2. �...
If * is an operation such that a * b = 3a – 4b. find the value of 3*4
Penicillium is a _____________.
The six freedoms in Article 19 can be curtailed by:
New education policy. 2020 is goal to achieve 100% gross enrolment Ratio (GER) in school Education by the year ________.
If the square root of the product of two numbers equals their average, then
Relevant for Exams:
