Mathematics, 29.08.2019 13:20 jaymoney0531
The time required to deliver and install a computer at a customer's location is t= 4 + d over r, where t is time in hours, d is the distance, in miles, from the warehouse to the customer's location, and r is the average speed of the delivery truck. if it takes 6.2 hours for the employee to deliver and install a computer for a customer located 100 miles from the warehouse, what is the average speed of the delivery truck?
Answers: 1
![t=4+\frac{d}{r} \\ \\ t=6.2 \ [h] \\ d=100 \ [miles] \\ \\ 6.2=4+\frac{100}{r} \\ 6.2-4=\frac{100}{r} \\ 2.2=\frac{100}{r} \\ 2.2r=100 \\ r=\frac{100}{2.2} \\ r=45 \frac{5}{11} \\ r \approx 45.45 \ [\frac{miles}{h}]](/tpl/images/0208/8071/a3dd9.png)
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