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Q:

Raghu can complete a work in 12days working 9 hours a day. Arun can complete the same work in 8 days working 11 hours a day. If both Raghu and Arun work together, working 12 hours a day, in how many days can they complete the work ?

A) $3 \frac{4}{49} d a y s$

B) $12 \frac{4}{49} d a y s$

C) $4 \frac{3}{49} d a y s$

D) $4 \frac{12}{49} d a y s$

A) Option A	B) Option B
C) Option C	D) Option D

Answer & Explanation Answer: C) Option C

Explanation:

Raghu can complete the work in (12 x 9)hrs = 108 hrs.

Arun can complete the work in (8 x 11)hrs = 88 hrs.

Raghu's 1 hrs work = 1/108 and Arun's 1 hrs work = 1/88

(Raghu + Arun)'s 1 hrs work = $(\frac{1}{108} + \frac{1}{88}) = \frac{49}{2376}$

So, both Raghu and Arun will finish the work in $\frac{2376}{49} h r s$

Number of days of 12 hours each= $(\frac{2376}{49} \times \frac{1}{12})$ = $\frac{198}{49} = 4 \frac{3}{49} d a y s$

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Filed Under: Time and Work
Exam Prep: GATE , CAT , Bank Exams
Job Role: Bank PO , Bank Clerk

6 6770

Q:

Direction: What should come in the place of question mark (?) in the following number series?

9, 11, 16, 26, ?, 69

A) 31	B) 38
C) 43	D) 45

Answer & Explanation Answer: C) 43

Explanation:

Double Difference pattern is followed in the above series. +2, +5, + 10, +17, +26

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Filed Under: Numbers
Exam Prep: AIEEE , Bank Exams , GATE

0 6769

Q:

In plants, exchange of gases takes place through

A) Stomata	B) Palisade tissue
C) Spongy tissue	D) mid rib

Answer & Explanation Answer: A) Stomata

Explanation:

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Filed Under: Biology

48 6768

Q:

What is SQL*Plus? Explain its features

Answer

SQL*plus allows SQL and PL/SQL scripts to interactively run in command line.

It allows three kinds of commands to run; SQL, PL/SQL and SQL * Plus commands. It’s most commonly used by DBA’s to interact with the oracle database.

Workspace

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Subject: Oracle

8 6762

Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative

Assertion (A) : Razia Sultan was the daughter of Iltutmish.

Reason (R) : Iltutmish was a rebel.

A) Both A and R are true and R is the correct explanation of A.	B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false.	D) A is false but R is true.

Answer & Explanation Answer: C) A is true but R is false.

Explanation:

litutmish was a ruler of slave dynasty and Razia was his daughter.

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Filed Under: Assertion and Reason

4 6761

Q:

The average of the ages of Sumit, Krishna and Rishabh is 43 years and the average of the ages of Sumit, Rishabh and Rohit is 49 years. If Rohit is 54 years old, what is Krishna'a age ?

A) 48 yrs	B) 42 yrs
C) 40 yrs	D) 36 yrs

Answer & Explanation Answer: D) 36 yrs

Explanation:

Let present ages of Sumit=w, Krishna=x, Rishabh=y and Rohit=z , then
w+x+y = 43x3 = 129 ---(i) and
w+y+z = 49x3 = 147 ---(ii)
Subtracting (i) from (ii), (w+y+z) - (w+x+y)=147 -129 , z- x =18 ---(iii)
Given Rohit's age => z = 54, so from (iii), x = 54-18 = 36

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Filed Under: Problems on Ages
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6 6761

Q:

The doctrine of three jewels- Right belief, Right conduct and Right Knowledge- is the crownings glory of

A) Buddhism	B) Christianity
C) Jainism	D) None of these

Answer & Explanation Answer: C) Jainism

Explanation:

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Filed Under: Indian History

11 6759

Q:

The Constituent Assembly of India started functioning from

A) 9th December,1946	B) 1st January, 1947
C) 26th January, 1947	D) 15th August, 1947

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