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- Question
- In a town 80% of the population are adults of which the men and women are in the ratio of 9 : 7, respectively. If the number of adult women is 4.2 lakh, what is the total population of the town?
Options- A. 12 lakh
- B. 9.6 lakh
- C. 9.8 lakh
- D. 11.6 lakh
- Correct Answer
- 12 lakh
Explanationlet the number of adult men be N.
Then, ratio of the numbers of adult men and adult women
9 : 7 = N : 4.2
? N = (9/7) x 4.2 = 5.4 Lakh
Total adult population = 4.2 + 5.4 = 9.6 lakh.
If the population of the town be M Lakh,
then, 80M/100 = 9.6
? M = (9.6 x 100)/80 = 12 lakh - 1. Rs. 1870 has been divided into three parts in such away that half of the first parts, one-third of the second parts, and one-sixth of the third parts are equals. The third parts is?
Options- A. Rs. 510
- B. Rs. 680
- C. Rs. 850
- D. Rs. 1020 Discuss
- 2. The ratio of milk and water in 85 kg of adulterated milk is 27 : 7. The amount of water which must be added to make the ratio 3 : 1 is?
Options- A. 5 kg
- B. 6.5 kg
- C. 7.25 kg
- D. 8 kg Discuss
- 3. 35% of a number is two times 75% of another number. What is the ratio between the first and the second number, respectively?
Options- A. 35 : 6
- B. 31 : 7
- C. 23 : 7
- D. 32 : 9 Discuss
- 4. The ratio of the ages of a father to that of their ages (in years) is 1000, then find the father's age after 10 yr.
Options- A. 50 yr
- B. 60 yr
- C. 80 yr
- D. 100 yr Discuss
- 5. The ratio between the ages of A and B is 3 : 5 and the sum of their ages is 56 yr. The ratio between their ages 7 yr ago was
Options- A. 3 : 4
- B. 3 : 5
- C. 1 : 2
- D. 2 : 3 Discuss
- 6. Mr. Shrimant inherits 2505 gold coins and divides them among his three sons, Bharat, Parat and Marat, in a certain ratio. Out of the total coins received by each of them, Bharat sells 30 coins Parat donates his 30 coins and Marat losses 25 coins. Now the ratio of gold coins with them is 46 : 41 : 34, respectively. How many coin did Parat receive from his father?
Options- A. 705
- B. 950
- C. 800
- D. 850 Discuss
- 7. ? 600 are divided among A, B and C such that ? 40 more then 2/5th of A's share, ? 20 more then 2/7 th of B's Share and ? 10 more then 9/17 th of C's share, all are equal. What is B's share?
Options- A. ? 150
- B. ? 185
- C. ? 280
- D. ? 285 Discuss
- 8. Salaries of Akash, Bablu and Chintu are in the ratio of 2 : 3 : 5. If their salaries were increased by 15%, 10% and 20% respectively, then what will be the new ratio of their salaries?
Options- A. 3 : 3 : 10
- B. 23 : 33 : 60
- C. 20 : 22 : 40
- D. None of these Discuss
- 9. In the month of January, Arun's income and expenses were ? 15000 and ? 9000, respectively. His monthly expenses vary directly as the square of his monthly income. What is his income when it just equals his expenses?
Options- A. ? 25000
- B. ? 2000
- C. ? 35000
- D. ? 15000 Discuss
- 10. A cat takes 5 leaps for every 4 leaps of a a dog but 3 leaps of the dog are equal to 4 leaps of the cat. What is the ratio of the speeds of the cat to that of the dog?
Options- A. 11 : 15
- B. 15 : 11
- C. 16 : 15
- D. 15 : 16 Discuss
Ratio and Proportion problems
Search Results
Correct Answer: Rs. 1020
Explanation:
1/2A = 1/3B =1/6C = x
? A = 2x, B = 3x, C =6x
? A : B : C = 2 : 3 : 6
Third part = Rs. (1870 x 6/11) = Rs. 1020
Correct Answer: 5 kg
Explanation:
Milk = 85 x (27/34) kg = 135/2 kg = 67.5 kg
Water = 85 x (7/34) kg = 35/2 kg = 17.5 kg
Let Amount of water to be added is x,
? 67.5 / (17.5 + x) = 3/1
? 3 (17.5 + x) = 67.5
? x =5
? Water to be added = 5 kg.
Correct Answer:
Explanation:
Let first number is P and second number is Q.
Then, according to the question,
P x 35% = 2 x Q x 75%
? (P x 35)/100 = (2 x Q x 75)/100
? P/Q = (2 x 75)/35 = (2 x 15)/7 = 30/7
? P : Q = 30 : 7
Correct Answer: 60 yr
Explanation:
Let the age of father = 5k
and the age of son = 2k
According to the question,
5k x 2k = 1000
? 10k2 = 1000
? k2 = 100
? k = ?100 = 10
? Father's age after 10 yr = (5k + 10)
= 5 x 10 + 10
= 60 yr
Correct Answer: 1 : 2
Explanation:
Age of A = (3/8) x 56 = 21 yr
Age of B = (5/8) x 56 = 35 yr
Before 7yr, ration of the ages of A and B
= (21 - 7) : (35 - 7)
= 14 : 28
= 1 : 2
Correct Answer: 850
Explanation:
According to the question.
(46k +30) + (41k + 30) + (34k + 25) = 2505
? 121k = 2505 - 85 = 2420
? k = 2420/121 = 20
? Number of coins received by Parat = 41k + 30
= 41 x 20 + 30 = 850
Correct Answer: ? 280
Explanation:
2A/5 + 40 = 2B/7 + 20 = 9C/17 + 10 = K
Then, A = (5/2) x (K - 40), B = (7/2) x (K - 20), C = (17/9) x (K - 10)
According to the question, A + B + C = 600
? (5/2) x ( K - 40) + (7/2) x (K - 20) + (17/9) x (K - 10) = 600
? 45 x (K - 40 ) + 63 x (K - 20) + 34 x (K - 10) = 10800
? 45K - 1800 + 63K - 1260 + 34K - 340 = 10800
? 142K - 3400 = 10800
? 142K = 10800 + 3400
? 142K = 14200
? K = 14200/142 =100
? B = (7/2) x (K - 20) = (7/2) x (100 - 20)
= (7 x 80)/2 = 7 x 40
= ? 280
Correct Answer: 23 : 33 : 60
Explanation:
Ratio of salaries
Akash : Babloo : Cintu 2 : 3 : 5
Let the common ratio be 'k'
Then, salaries of Akash, Babloo and chintu will be 2k, 3k and 5k, respectively.
Now, 15% increase in Akash's salary = 15% of 2k
= 15 x 2k/100 = 0.3k
New salary = 2k + 0.3k = 2.3k
Also, 10% increase in Babloo's salary = 10% of 3k
= 10 x 3k/100 = 0.3k
? New salary = 3k + 0.3k = 3.3k
Again, 20%increase in Chintu's salary = 20% of 5k
= 20 x 5k/100 = 1k
New salary = 5k + k = 6k
? New ratio = Ratio of new salaries = 2.3k : 3.3k : 6k
On multiplying with 10 and dividing by k ratio will be 23 : 33 : 60.
Correct Answer: ? 15000
Explanation:
According to the question
Expenses ? (income)2
? 9000 = K (15000 )2
? K = 9000/(15000)2
= 1/25000
Again E = K x 12
? 1 = K x 12 [? exenses = income]
? 1 = 1/K = 25000
? Required answer = ? 25000
Correct Answer: 15 : 16
Explanation:
4 leaps of cat = 3 leaps of dog
? 1 leap of cat = 3/4 leap dog
Cat takes 5 leaps for every 4 leaps of dog
? Required ratio = (5 x Cat's leap ) : ( 4 x Dog's leap)
= (5 x 3/4 dog's leap) : (4 x Dog's leap)
= 15 : 16
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