Naukri Wala

Boats and Streams    Let us know what is Downstream and what is Upstream . Because these concepts are the heart of Boats and Streams. Downstream :  In water,the direction along the stream is called downstream. I mean, If a boat or a swimmer swims in the same direction as the stream, then it is called downstream. Obviously the boat or swimmer require less efforts to travel using downstream. Because the stream itself helps the objects to move.  Remember, as the object moves along with the water, the stream helps the object.  So, the down stream speed (DS) is  DS =  U+V where U is the speed of the object in the still (calm) water V is the speed of the water.  Upstream :  If the boat or the swimmer is swimming in the opposite direction in which the stream is passing is called upstream. In simple words, the direction against the stream is called upstream. Remember, as the object moves against the water pushes the object in opposite direction....

You have to Compare the given fractions in a number of problems in Data Interpretation and Quantitative Ability. Let us study some of the common methods of identifying out the largest or smallest of a given set of fractions which are useful for Mental Maths.  Type – 1 When the numerators are same and the denominators are different, the fraction with the largest denominator is the smallest. Have a look at the following example. Example : Which of the following fractions is the smallest? (3/5) , (3/7) , (3/13), (3/8) Here, 13 is the largest denominator, so, (3/13) is the smallest fraction. 5 is the smallest denominator, hence (3/5) is the largest fraction. Here logic is very simple,  Situation: (i) Assume that you are 5 Children in your family. Your Dad brought an Apple and mom cut it into 5 pieces and distributed among all the children including you. (1/5) Situation (ii) : Assume that you are 8 Children in your family. Your Dad brought an Apple and mom cut it into 8...

    1.     Concept of percentage or Percentage formula To express x% as a fraction: We have, x% x/100 Thus, 30%=30/100= 3/10 In simple terms we can conclude that percentage symbol "%" means 1/100 In case we are having a fraction and we have to calculate its percentage then we will multiply it by 100. that is,  a/b=(a/b)×100)% 2.     Increase or decrease in percentage with price ( 1 ) If the price of a commodity increases by R%, then the reduction in consumption so as not to increase the expenditure will be = [R/ (100+R)×100]% ( 2 ) If the price of a commodity decreases by R%, then the increase in consumption so as not to decrease the expenditure will be = [R/(100−R)×100] 3.     Results on population Formula's on result of population are very important when we have to calculate the population n years after or n years before, Let the population of a town be P now and suppose it increases at the rate of R% per annum, then ( 1 ) ...