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Q:

The speed of a boat when travelling downstream is 32 km/h, whereas when travelling upstream it is 28 km/h. What is the speed of the boat in still water?

A) 27 km/h B) 29 km/h
C) 31 km/h D) Cannot be determined
 
Answer & Explanation Answer:

Explanation:

Ans.  Suppose the speed of boat in still water is x km/h and speed of stream is y km/h

Speedof boat in downstream = (x + y) km/h x+ y = 32 …(i) 

Speed of boat in upstream = (x – y) km/h

x – y = 28 …(ii)

Add. Eqs. (i) and (ii), we get 2x = 60

x = 30 km/h

 

 

 

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Filed Under: English
Exam Prep: CAT , GRE , TOEFL

Q:

Walking at a speed of 10 km/hr, Madhu reaches her university 15 minutes late. Next time she increases her speed by 2 km/hr, but she is still late by 5 minutes. The distance of the university from her house is:

A) 15 km B) 30 km
C) 20 km D) 10 km
 
Answer & Explanation Answer: D) 10 km

Explanation:
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Filed Under: Time and Distance
Exam Prep: AIEEE , Bank Exams , CAT , GATE

Q:

A boat goes 15 km upstream and 10 1/2 km down stream in 3 hrs 15 min. It goes 12 km upstream and 14 km downstream in 3 hrs. What is the speed of the boat in still water?

A) 4 B) 6
C) 10 D) 14
 
Answer & Explanation Answer: C) 10

Explanation:
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Filed Under: Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

Q:

In each of the questions given below, a passage has been given which are either situational based or describes a scenario. Below each passage, a question has been given which is framed to make you to infer something out of it. Mark out the correct inference as your answer.
A former lawmaker, Rewati Raman Bhandari, who drafted the measure that criminalised chhaupadi, said the push to eradicate the practice from villagers, the police and local politicians was still far too muted.
Which of the following describes the reaction of the authorities of towards the eradication of chhaupadi?

A) Subdued B) Softened
C) Dampened D) Quite
 
Answer & Explanation Answer: A) Subdued

Explanation:

Subdued means restrained in style or quality. Softened means being or made softer or less loud or clear.
Dampened means to suppress or constrain so as to lessen in intensity. Quite means to a degree (not used with a negative).
Silenced means reduced to silence. The reaction of the authorities is already mentioned, i.e. muted. All the options, except 'quite', are synonymous with 'muted'. But the reaction was toned-down. Hence, the correct answer is 1.

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Filed Under: English
Exam Prep: TOEFL , GRE , CAT

Q:

Equal distance is covered by a boat in upstream and in downstream in total 5 hours. Sum of speed of a boat in upstream and downstream is 40 km/hr. Speed of boat in still water is 600%
more than the speed of stream. Find theapproximate distance covered by boat in downstream (in km).

A) 45 B) 50
C) 55 D) 60
 
Answer & Explanation Answer: B) 50

Explanation:

let speed of boat= X, speed of stream= Y
Upstream speed= X-Y
Downstream speed= X+Y
Sum of upstream & downstream= (X-Y) +(X+Y)= 2X
So, 2X= 40
X= 20 km/hr
Speed of boat : speed of stream= 600+100 :100= 7:1
So speed of Stream= 20/7 km/hr
ATQ, D/( X-Y) + D/( X+Y) = 5
D/(120/7) + D/(160/7)= 5
D= 480×5/49= 48.97 km= 50 Km(approx)

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Filed Under: Boats and Streams
Exam Prep: Bank Exams , GATE

Q:

Mahesh rows to the place 80 km away and back in 20 hours. He finds that he can row 8 km downstream in the same time as 4 km upstream. The speed of the boat in stillwater is

A) 9 kmph B) 7 kmph
C) 2 kmph D) 5 kmph
 
Answer & Explanation Answer: A) 9 kmph

Explanation:
If Mahesh moves 8 km downstream in X hours

Downstream speed = 8/X kmph

upstream speed = 4/X kmph

Now 80/(8/X) + 80/(4/X)=20

X=2/3

downstream Speed = 8/(2/3)= 12 kmph

upstream Speed = 4/(2/3)= 6 kmph

Rate of the stream = (12+6)/2= 9 kmph

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Filed Under: Boats and Streams
Exam Prep: Bank Exams

Q:

Which of the following statements is/are true/false about speed of sound in different media at 25 °C ?
A. In oxygen gas, the speed of sound is 316 km/s.
B. In water (distilled), the speed of sound is 1498 km/s

A) Only A is true B) Both A and B are true
C) Neither A nor B is true D) Only B is true
 
Answer & Explanation Answer: C) Neither A nor B is true

Explanation:
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Filed Under: Statement and Conclusions

Q:

7/9 of the people present in a hall are sitting in 9/13 of the chairs available and the rest are standing. If there are 28 empty 9 sitting chairs, how many chairs would have been still empty if everyone in the hall was sitting?

A) 15 B) 12
C) 18 D) 10
 
Answer & Explanation Answer: D) 10

Explanation:
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Filed Under: Arithmetical Reasoning
Exam Prep: AIEEE , Bank Exams