Question
The speed of the cycle changes with the change in speed
of wind. Time taken by cycle to travel 20 km., is 2 hours when wind is in the direction of the cycle moving, and time taken to travel the same distance against the wind is 3 hours. Find out the percentage increase in speed of the cycle to cover the distance in same time.Solution
Let the speed of cycle be ‘X’ km/hr. and speed of wind be ‘Y’ km/hr. As per the question, X+Y = 20/2 X+Y = 10 km/hr.-------------- (1) X-Y = 20/3 Km/hr.------------(2) Solving (1) and (2) X= 50/6 Km/hr. Y = 10/6 Km/hr. Speed is required to cover the 20 km in 2 hr. When the speed of wind is against the cycle. 10= S-(10/6) S= 10+(10/6) S= 70/6 Km/hr. Required Increased in Speed = 70/6-50/6 = 20/6 Required percentage = (20/6)/ (50/6) x 100 = 40%
Which of the following plant species is used to produce soft rot resistance through protoplasm fusion?
In dryland agriculture, contingency cropping is due to
This method uses microwaves and silica gel for fast and effective flower dryingÂ
In soil plaque method of soil fertility assessment developed by Winogradsky, which micro organism is studied?
The cultivation of crops with an annual rainfall is more than 1150 mm is called as-
Which chromosome model was proposed by Du Praw on the basis of observation made on Human Chromosome?
Fish which can float in the water column just above the seafloor.
Match List I with List II
List I ...
The study of soil from the stand point of higher plants is known as……………………….
Shallow depth consist of which of the following?
