Final answer:
The watch is cheaper in Geneva by 18 British Pounds (£) after converting the Geneva price using the given exchange rate of £1 = 1.55 CHF.
Step-by-step explanation:
To determine in which city the watch is cheaper, we need to convert the Swiss Francs (CHF) price to British Pounds (£) using the given exchange rate and then compare the prices.
The given exchange rate is £1 = 1.55 CHF. To convert 193.75 CHF to British Pounds, we divide the price in CHF by the exchange rate:
193.75 CHF ÷ 1.55 CHF/£1 = 125 £
Now we compare the prices:
- Price in Geneva: 125 £
- Price in Manchester: 143 £
Since 125 £ < 143 £, the watch is cheaper in Geneva.
To find out by how much the watch is cheaper, we simply subtract the price in Geneva from the price in Manchester:
143 £ - 125 £ = 18 £
Therefore, the watch is 18 £ cheaper in Geneva compared to Manchester.