Question
The speed of a boat in still water is 5 times the speed
of the stream. If the difference between the upstream and downstream speed of the boats is 24 km/hr, then find the time taken by the boat to travel 384 km in upstream.Solution
Let the speed of the stream be ‘x’ km/hr Therefore, speed of the boat in still water = 5x km/hr Upstream speed of the boat = 5x – x = 4x km/hr Downstream speed of the boat = x + 5x = 6x km/hr According to the question, 6x – 4x = 24 => 2x = 24 => x = 12 Therefore, upstream speed of the boat = 4x = 48 km/hr Required time taken = 384/48 = 8 hours
Insect order of tea mosquito bug is:
The number of hydro-meteorological hazards in recent decades (drought, flood, windstorms etc):
What should be the lime dose (kg/ha) when pH of the soil is in between 4.5- 5? Â
What is the variation of elytra where the forewings of Hemipterans are partially membranous and partially hardened?
Calculate EIL in terms of pest population/ha with the following figures.
C= management cost per unit area = Rs. 3000/ha; V= market value (in R...
What is the primary function of the Malpighian tubules in arthropods?
Stem bleeding is a disorder of
Which gas is primarily emitted from rice fields?
A method of asexual propagation in which a stem is made to produce roots while still attached to the parent plant is calledÂ
Instrument used for measuring Relative humidity accurately in the crop canopy:
