Start learning 50% faster. Sign in now
Let’s assume the speed of boat in still water and the speed of stream are ‘B’ and ‘C’ respectively. The ratio between the time taken by a boat to cover a certain distance in upstream and the same distance in downstream is 5:1 respectively. Let’s assume the distance covered in each stream by the boat is ‘d’ km. [d/(B-C)] / [d/(B+C)] = 5/1 (B+C)/(B-C) = 5/1 (B+C) = 5(B-C) B+C = 5B-5C 5B-B = 5C+C 4B = 6C 2B = 3C If the speed of the stream is 60 km/h. 2B = 3x60 = 180 B = 90 The same boat can cover the same distance which was covered in upstream in still water in (35/3) hours. d/90 = 35/3 d/30 = 35 d = 35x30 d = 1050 km The distance covered by the boat in downstream = 1050 km
What is the primary use of calcium carbonate in antacid tablets?
Which enzyme is derived from soybeans?
What is the chemical formula of bleaching powder?
The pH value of an acidic solution is:
Which of the following substances are ozone-depleting?
Select the correct answer from the code given below.
I. ...
The nucleus of an atom consists of-
Which alloy is formed by mixing iron with carbon, nickel, and zinc?
Calcium cyanamide, used as a fertilizer, is commercially known as ______.
Which gas is commonly used to fill balloons?
What is the pH value of pure water ?