Question
An elephant can do a work as fast as two horses ‘A’
and ‘B’ can do it by working together. If horse ‘A’ alone can complete the work in 20 hours and horse ‘B’ in 30 hours, then find the time taken by elephant to complete the work.Solution
Let the total work = 60 units Efficiency of horse who can complete the work in 20 hours = 60/20 = 3 units/hour Efficiency of horse who can complete the work in 30 hours = 60/30 = 2 units/hour Therefore, time taken by both horses to complete the work together = 60/(3 + 2) = 12 hours Therefore, time taken by the elephant to complete the work = 12 hours
Which of the following numbers will replace the question mark (?) in the given series?
115, 130, 122, 137, 129, ?
'Wilt' is related to 'Droop' in the same way as 'Thrive' is related to '______'.
In a certain code language, ‘BUZZY’ is coded as ‘10’ and ‘KING’ is coded as ‘8’. How will ‘ABROAD’ be coded in that language?
...Statement: H
F ≥ U = M conclusion:
i) M> I
ii) P>
iii) H
Which of the following options is the option of which all members remain on the same floor?
 In a certain code language, ‘i know you’ is written as ‘mo rc tp’ and ‘do they know’ is written as ‘hk mo be’. How is ‘know’ writt...
The equations in the statements represent the heights of the given letters. According to these equations, find who is the shortest amongst all.
In the following question, select the related letters from the given alternatives.
PTX : RVZ :: CGK : ?Â
From the given answer figures, select the one in which the question figure is hidden/embedded.
How many triangles are there in the given figure?
