The ratio of gold to copper in a bracelet is 4 : 7. If the price of copper is 1/10th the price of gold, find the cost of the bracelet if the cost of copper in the bracelet is 28000 rupees.
Show answer & explanation
Correct answer: C
Explanation
Given:
Gold : Copper = 4 : 7
Value of copper = 1/10 of the value of gold
Total value of copper = ₹28,000
By the formula:
Total value = Value of gold + Value of copper
Let the per unit value of gold = G
Value of copper = G/10
Total value of gold = 4G
Total value of copper = 7(G/10)
7(G/10) = 28,000
7G = 280,000
G = 40,000
Total value of gold = 4 × 40,000 = 160,000
Total value of bracelet = 160,000 + 28,000 = 188,000
Value of bracelet = ₹188,000