Bissoy.com
Doctors Medicines MCQs Q&A

Gold and platinum are mixed in a ratio 8 : 9 to make a ring. Find the ratio of their price in the ring if the price of platinum is 0.7 times the price of gold.

Gold and platinum are mixed in a ratio 8 : 9 to make a ring. Find the ratio of their price in the ring if the price of platinum is 0.7 times the price of gold. Correct Answer 80 : 63

Let the price of gold per unit be x. The price of gold in the ring = x * 8 = 8x The price of platinum per unit = 0.7 times the price of gold = 0.7x The price of platinum in the ring = 0.7x * 9 = 6.3x The ratio of price of gold to platinum in the ring = 8x : 6.3x = 80 : 63

Related Questions

Simplify the value of $$\frac{{{\text{0}}{\text{.9}} \times {\text{0}}{\text{.9}} \times {\text{0}}{\text{.9 + 0}}{\text{.2}} \times {\text{0}}{\text{.2}} \times {\text{0}}{\text{.2 + 0}}{\text{.3}} \times {\text{0}}{\text{.3}} \times {\text{0}}{\text{.3}} - {\text{3}} \times 0.9 \times {\text{0}}{\text{.2}} \times {\text{0}}{\text{.3}}}}{{{\text{0}}{\text{.9}} \times {\text{0}}{\text{.9 + 0}}{\text{.2}} \times {\text{0}}{\text{.2 + 0}}{\text{.3}} \times {\text{0}}{\text{.3}} - 0.9 \times {\text{0}}{\text{.2}} - {\text{0}}{\text{.2}} \times {\text{0}}{\text{.3}} - 0.3 \times 0.9}} = ?$$
$$\frac{{38 \times 38 \times 38 + 34 \times 34 \times 34 + 28 \times 28 \times 28 - 38 \times 34 \times 84}}{{38 \times 38 + 34 \times 34 + 28 \times 28 - 38 \times 34 - 34 \times 28 - 38 \times 28}}$$            is equal to = ?
In this question, three statements are given followed by four conclusions. Choose the Conclusion(s) which best fit(s) logically. Statements : 1) All gold are platinum. 2) Some platinum are silver. 3) All silver are diamonds. Conclusions : I. Some diamonds are platinum. II. Some diamonds are gold. III. Some silver are gold. IV. Some platinum are diamonds.
Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -
A cinema house has 600 people. \(26\frac{2}{3}{\rm{\% }}\) People buy premium tickets and \(33\frac{1}{3}{\rm{\% }}\) People buy gold tickets and 40% of people buy platinum tickets. Only 5% of people buy both platinum and gold tickets and 10% of people buy both premium and platinum tickets and \(6\frac{2}{3}{\rm{\% }}\) of people buy both premium and gold tickets and 30 people buy all three types of tickets. Find the number of people who buy only one type of ticket.
The owner of PC Jewellers has a brick of 38 pt. platinum and 19 pt. platinum. He wanted to obtain a brick of 30 pt. platinum, weighing 190 grams by melting these 2 bricks. Find how much of each must be melted to obtain the required bar? (Given: pure platinum is 95 pt.)
The ratio of gold and silver in a ring is 4 : 7. The ring costs 61100 rupees. Find the price of the gold in the ring if silver costs 1/10th of gold.
The ratio platinum to silver in a bracelet is 5 : 7. If the price of platinum is 1/10th the price of silver, find the cost of the bracelet if the cost of platinum in the bracelet is 24000 rupees.
J.C. Jewellers knows that pure gold is too soft for everyday wear. So he make 2 alloys with a mixture of metals like platinum to give it strength and durability. Alloy X and Y are prepared by mixing metals in the proportion 9 : 2 and 9 : 13 respectively. If equal quantities of the alloy are melted to form third alloy Z. What will be the proportion of gold and platinum in Z?
$$\eqalign{ & {\text{The}}\,{\text{value}}\,{\text{of}} \cr & \frac{{0.1 \times 0.1 \times 0.1 + 0.02 \times 0.02 \times 0.02}}{{0.2 \times 0.2 \times 0.2 + 0.04 \times 0.04 \times 0.04}}\,\text{is}: \cr} $$