∵ 5 teaspoons of water dropped every 3 hours
∵ We need to find the time taken for 75 teaspoons
→ By using the ratio method
→ Time: teaspoons
→ 3 : 5
→ h : 75
→ By using cross multiplication
∵ 5 x h = 3 x 75
∴ 5h = 225
→ Divide both sides by 5 to find h
∴ h = 45
It will take 45 hours
