A boat running downstream covers a distance of 50 km in 2(1/2) hrs and the same distance upstream in 10 hrs. What is the speed of the boat in still water?
Let the speed of boat in still water be x km/hr Speed of the stream = y km/hr Now, speed downstream (u) = (x + y) km/hr, and Speed upstream (v) = (x - y) km/hr According to question, Speed downstream = distance/time (x + y) = (50 × 2)/5 (x + y) = 20……………(i) Speed upstream = distance/time (x - y) = 50/10 (x - y) = 5…………………..(ii) Now, speed of boat in still water = (u + v)/2 km/hr ∴ Speed of boat in still water = (20 + 5)/2 km/hr = 25/2 km/hr = 12.5 km/hr
T.S.S of Tomato puree should be (ºBrix)
A farmer can become an entrepreneur by
_____ are the non-nutritive substances usually added to basal feed in small quantity for the fortification in order to improve feed efficiency and produ...
What is the Purpose of Instrument Tintometer?
What type of wing coupling is characterized by a row of small hooks on the hind wing engaging the folded posterior edge of the fore wing?
This type of antennae have flattened segments that resemble plates. They are often found in butterflies and moths and are adapted for detecting odor mol...
Pure forest is a type of forest in which composition of one species not less than ____
One insect is benefited by living on or inside another insect without injuring the other is known as:
The cause of formation of salt- affected soils, consisting of saline and alkaline soils is
ISO series 22000 related to
