a) While in Europe, if you drive 117 km per day, how muchmoney would you spend o

Question

a) While in Europe, if you drive 117 km per day, how muchmoney would you spend on gas in one week if gas costs 1.10 eurosper liter and your car's gas mileage is 42.0 mi/gal? Assumethat 1euros = 1.26 dollars.      dollars? b) A specific brand of gourmet chocolate candy contains7.00 g of dietary fat in each 22.7-g piece. How many kilograms ofdietary fat are in a box containing 2.00 lb ofcandy?              kg? a) While in Europe, if you drive 117 km per day, how muchmoney would you spend on gas in one week if gas costs 1.10 eurosper liter and your car's gas mileage is 42.0 mi/gal? Assumethat 1euros = 1.26 dollars.      dollars? b) A specific brand of gourmet chocolate candy contains7.00 g of dietary fat in each 22.7-g piece. How many kilograms ofdietary fat are in a box containing 2.00 lb ofcandy?              kg?

Explanation / Answer

I think the aim of these questions is to get you used to puttingunits into your calculations, so you can tell whether to divide ormultiply things. Either that, or so you can see the horriblenessthat is the Imperial unit system! (A) How many km per week?     117 km/day * 7 days/wk = 819 km/wk How many miles per week?     819 km/wk * 0.6214 miles/km = 508.9266 miles/wk How many gallons per week?     508.9266 miles/wk / 42.0 miles/gallon = 12.1173 gallons/wk How many litres per week?     12.1173 gallons/wk * 3.7854litres/gallon = 45.8688litres/wk How many euros per week?     45.8688 litres/wk * 1.10 euros/litre = 50.4557 euros/wk FINALLY(!) How many dollars per week?     50.4557 euros/wk * 1.26 dollars/euro = $63.57 OR You could just do it all in one go: 117 km/day* 0.6214 mi/km/ 42 mi/gal *3.7854 gal/L * 1.10 eu/L * 1.26$/eu* 7 days/wk =$63.57/week (B) How many g fat per lb candy?     7 g fat / 22.7 g candy * 0.002205 lb/g = 7 g fat / 0.0500535 lbcandy                                                               = 139.85 g fat / lb candy How many g fat per 2 lb candy?     139.85 g fat / lb candy *2 lb candy = 279.7 gfat How many kg fat per 2 lb candy?     279.7 g fat / 1000 g/kg = 0.280 kg fat

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