Find the fourth proportion to 3, 7 and 9.

Related Mcqs:

1. A surn of money is to be distributed among A, B, C, D in the proportion of 5 : 2 : 4 : 3. If C gets Rs. 1000 more than D, what is B’s share ?

   A. Rs. 500
   B. Rs. 1500
   C. Rs. 2000
   D. None of these

2. According to a recipe, 400 grams of flour should be mixed with 500 grams of sugar to bake cookies. If I have only 300 grams of flour, how much sugar should I mix to maintain the same proportion?

   A. 360
   B. 380
   C. 375
   D. 400

3. Find the mean proportion between 5 and 45.

   A. 9
   B. 15
   C. 25
   D. 50

4. The average age of three boys is 15 years and their ages are in proportion 3:5:7. What is the age in years of the youngest boy?

   A. 15
   B. 9
   C. 18
   D. 21

5. Three pipes A, B and C can fill a tank from empty to full in 30 minutes, 20 minutes and 10 minutes respectively. When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solutions P, Q and R respectively. What is the proportion of solution R in the liquid in the tank after 3 minutes?

   A. 5/11
   B. 6/11
   C. 7/11
   D. 8/11

6. In what proportion must water be added to spirit to gain 20% by selling it at the cost price?

   A. 2:5
   B. 1:5
   C. 3:5
   D. 4:5

7. In a mixture of milk and water, the proportion of milk by weight was 80%. If, in a 180 gm mixture, 36 gms of pure milk is added, what would be the percentage of milk in the mixture formed?

   A. 80%
   B. 100%
   C. 84%
   D. 87.5%
   E. None of these

8. A is a working partner and B is a sleeping partner in the business. A puts in Rs.15000 and B Rs.25000, A receives 10% of the profit for managing the business the rest being divided in proportion of their capitals. Out of a total profit of Rs.9600, money received by A is?

   A. Rs.3240
   B. Rs.3600
   C. Rs.3800
   D. Rs.4200

9. If goods be purchased for Rs.840 and one-fourth be sold at a loss of 20% at what gain percent should the remainder be sold so as to gain 20% on the whole transaction?

   A. 30%
   B. 33%
   C. 33 1/3%
   D. 35%

10. A fruit vendor purchased 20 dozens of bananas at Rs. 15 per dozen. But one-fourth of the bananas were rotten and had to be thrown away. He sold two-third of the remaining bananas at Rs. 22.50 per dozen. At what price per dozen should he sell the remaining bananas to make neither a profit nor a loss?

    A. Rs. 20
    B. Rs. 15
    C. Rs. 22.50
    D. Rs. 7.50
    E. None of these