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- Question
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
Options- A. 9 kmph
- B. 7 kmph
- C. 2 kmph
- D. 5 kmph
- Correct Answer
- 9 kmph
ExplanationIf Mahesh moves 8 km downstream in X hoursDownstream 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
- 1. Find out the odd word/letters/number/number pair from the given alternatives.
Options- A. Hazy
- B. Cloudy
- C. Translucent
- D. Transparent Discuss
- 2. Find out the odd word/letters/number/number pair from the given alternatives.
Options- A. IDD
- B. AGG
- C. UTT
- D. REE Discuss
- 3. In an examination, 35% of total students failed in Hindi, 45% failed in English and 20% failed in both. Find the percentage of those studnets who passed in both the subjects ?
Options- A. 45%
- B. 35%
- C. 20%
- D. 40% Discuss
- 4. 0.1 decates ago, Vijaya was quadrice as old as her daughter Simran. 0.6 decades hence, Vijaya?s age will beat her daughter?s age by 0.9 decades. The proportion of the current ages of Vijaya and Simran is : [ 0.1 Decates =1 Year; quadrice = 4 times]
Options- A. 8:1
- B. 10:2
- C. 11:4
- D. 13:4 Discuss
- 5. Anmol soldtwo items for Rs 1000 each. On one, he gained 10% and on other, he lost 10%. How much did he gain or lose in the whole transaction?
Options- A. profit,0.95%
- B. loss,1%
- C. profit,10%
- D. loss,10% Discuss
- 6. What is the value of cosec 11?/6?
Options- A. -2/?3
- B. ?2
- C. -2
- D. -?2 Discuss
- 7. Find out the odd word/letters/number/number pair from the given alternatives.
Options- A. 358
- B. 853
- C. 538
- D. 240 Discuss
- 8. A dealer marks his goods 20% above their cost prices. Then,he allows such a discount on the marked price so that he makes a profit of 8%. The rate of discount is:
Options- A. 12%
- B. 10%
- C. 6%
- D. 4% Discuss
- 9. Sum of the ages of Rajesh, Suresh, Mahesh and Dinesh is 76 years. 7 years hence, their age ratio is 7:6:5:8. Find Mahesh?s present age ?
Options- A. 17 years
- B. 13 years
- C. 14 years
- D. 16 years Discuss
- 10. If the selling price is doubled, the profit triples. The profit percent is
Options- A. 66.6%
- B. 150%
- C. 100%
- D. 190% Discuss
More questions
Correct Answer: Transparent
Correct Answer: REE
Correct Answer: 40%
Correct Answer: 13:4
Explanation:
Let, Ages of Vijaya and Simran ? 1 year ago was 4A and A years correspondingly.
Then, [(4A + 1) + 6] ? [(A + 1) + 6] = 9
3A = 9 => A = 3
Needed Ratio = (4A + 1) : (A + 1) = 13 : 4
Correct Answer: loss,1%
Explanation:
Let the two item be A and B.
Cost price of A be x and cost price of B be y.
A sold for Rs 1000 on 10 % gain = 1.1x =1000
x= 1000/1.1 = 909.09
B sold for Rs. 1000 on 10% loss = 0.9y =1000y= 1000/0.9 = 1111.11
Total cost price of A and B = 2020.20
Selling price of A and B = 2000
Loss % = (2020.20 ?2000)/2000 X 100
= 1.01 % loss
Correct Answer: -2
Correct Answer: 240
Correct Answer: 10%
Correct Answer: 13 years
Explanation:
Given R + S + M + D = 76
=> R+7 : S+7 : M+7 : D+7 = 7:6:5:8
=> Let the ratio = x
=> M+7 = 5x
=> M = 5x-7
=> R = 7x-7
=> S = 6x-7
=> D = 8x-7
=> R + S + M + D = 76
=> 7x-7 + 6x-7 + 5x-7 + 8x-7 = 76
=> 26x - 28 = 76
=> 26x = 104
=> x = 4
=> Mahesh's present age = 5x-7 = 20 - 7 = 13 years.
Correct Answer: 100%
Explanation:
Let CP be x and SP be y.
3(y ?x) = (2y ?x)y = 2x
Profit = y ?x = 2x ?x = x
Profit% = x/x X 100 = 100%
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