Question

An architect plans to buy 5 stone spheres and 3 stone cylinders. For the same amount, he can buy 2 stone spheres and 7 stone cylinders. If one stone cylinder costs $32.73 how much does

each stone sphere cost?

Answer 1

• Each stone sphere costs $43.64

Explanation:

Let the cost of stone sphere is s and stone cylinder is c.

According to question we have equation:

• 5s + 3c = 2s + 7c

Solve it for s:

• 5s - 2s = 7c - 3c
• 3s = 4c

Substitute the value of c:

• 3s = 4*32.73
• 3s = 130.92
• s = 130.92/3
• s = 43.64