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Let the speed of the current be x km/hr According to the question, 15/(5 – x) – 20/(5 + x) = 5 Or, x2 + 7x – 30 = 0 Or, x2 + 10x – 3x – 30 = 0 Or, x(x + 10) – 3(x + 10) = 0 Or, (x – 3) = 0 or, (x + 10) = 0 X = -10 km/hr not possible Therefore, x = 3 km/hr Hence, option b.
Select the option figure in which the given figure is embedded (rotation is NOT allowed).
In this question, four statements are given in relation between letters, three related findings i, ii and iii have been given. When you consider the sta...
Select the option that is related to the third letter-cluster in the same way as the second letter-
cluster is related to the first letter-cluste...
Find the missing term in the following number series.
45, 65, 165, 345, ____
‘A and B’ means ‘A is the father of B’
‘A # B’ means ‘A is the son of B’
‘A ^ B’ means ‘A is the brother of B’s fa...
In the following question, select the related number from the given alternatives.
49: 245: 37: 148:: 47: ?
If 1st January 2017 was a Thursday, then what day of the week was it on 31st March of that year?
Four of the following five figures are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?
A is the brother of B. B is the son of C. D is the wife of C. E is the sister of D. How is A related to E?
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series. PHW, SKZ, WOD, BTI, ?
