Exams


Q:

Two trains running in opposite directions cross a pole placed on the platform in 47 seconds and 31 seconds respectively. If they cross each other in 33 seconds, what is the ratio of their speeds?

A) 1:7 B) 7:1
C) 2:3 D) 3:2
 
Answer & Explanation Answer: A) 1:7

Explanation:

Let the speed of the trains be x and y respectively
length of train1 = 47x
length of train2 = 31y
Relative speed= x + y
Time taken to cross each other = 33 s
=> 47x+31yx+y= 33
=> (47x + 31 y) = 33(x + y)
=> 14x = 2y
=> x/y = 2/14 = 1/7

 = 1:7

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Filed Under: Time and Distance
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4 4422
Q:

A alone can do a work in 20 days. B is 125% more efficient than A. A and B started working and worked for 4 days. If C alone completed the remaining job in 22 days. How many days C alone takes to complete the entire job?

A) 30 B) 35
C) 40 D) 42
 
Answer & Explanation Answer: C) 40

Explanation:
A alone can do = 20days 
 
Efficiency ratio of A & B= 4 : 5

Time required will be in ratio = 5:4

B alone will do it in =16 days

LCM of (16,20)= 80 ,
 
Assume work size of 80 units

 

1 day work of A= 4 units 1 day work of B= 5 units

 

Work done by both in 4 days= 4*(5+4)= 36 units

 

Work left= 80-36= 44 units

 

Now C takes 22 days to complete= 44 units.

 

Time taken by C alone to complete the work= 40 days
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Filed Under: Time and Work
Exam Prep: Bank Exams

0 4420
Q:

The cost price of a college bag is 240% more than the profit obtained on it selling at Rs. 1540. What is the cost price of that college bag?

A) Rs. 1190 B) Rs. 1288
C) Rs. 1365 D) Rs. 1452
 
Answer & Explanation Answer: A) Rs. 1190

Explanation:

Let the profit be Rs. p

Then Cost price of the bag = 340p/100 = 3.4p

According to question,

3.4p + p = 1540

4.4p = 1540

p = 1540/4.4

p = 350

The profit p = Rs, 350

 

Hence, The cost price of the bag = 3.4p = 3.4 x 350 = Rs. 1190.

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Filed Under: Profit and Loss
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14 4420
Q:

World Soil Day is celebrated on ?

A) July 26 B) June 30
C) August 9 D) December 5
 
Answer & Explanation Answer: D) December 5

Explanation:
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Filed Under: Important Days and Years
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15 4419
Q:

Reuptake refers to the

A) reabsorption of excess neurotransmitter molecules by a sending neuron B) release of hormones into the bloodstream
C) movement of neurotransmitter molecules across a synaptic gap D) inflow of myelin through an axon membrane
 
Answer & Explanation Answer: A) reabsorption of excess neurotransmitter molecules by a sending neuron

Explanation:

Reuptake refers to the process in the brain of neurons to retrieve chemicals that were not received by the next neuron. Neurons are cells in the brain that have miniscule spaces between them. They communicate with each other by sending chemicals across the space to the next neuron.

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Filed Under: Biology
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2 4418
Q:

There is sufficient salary to give K for 10 days and L for 15 days. Then how many days will the money last if both has to be given the salary ?

A) 6 days B) 12 days
C) 4 days D) 9 days
 
Answer & Explanation Answer: A) 6 days

Explanation:

K's 1 day's salary = 1/10
L's 1 day's salary = 1/15
Together their 1 day's salary = 1/10 + 1/15
= 3/30 + 2/30
= 5/30
= 1/6
So the money will be enough for paying them both for 6 days.

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Filed Under: Time and Work
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3 4417
Q:

Who gave the slogan Bharat Chhodo during the Quit India movement?

A) Gandhi B) Yusuf Meher Ali
C) Nehru D) Aruna Asif Ali
 
Answer & Explanation Answer: A) Gandhi

Explanation:

Mohandas Karamchand Gandhi gave the slogan Bharat Chhodo during the Quit India movement.

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Filed Under: Indian History
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20 4417
Q:

B is the brother of A and E is the brother of D. If D is the father of B then how E and A are related?

A) E is brother of A B) A is nephew of E
C) E is father of A D) E is Uncle of A
 
Answer & Explanation Answer: D) E is Uncle of A

Explanation:
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Filed Under: Blood Relations
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44 4416