From everyday questions to specialized queries, IDNLearn.com has the answers. Whether your question is simple or complex, our community is here to provide detailed and trustworthy answers quickly and effectively.

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?

Sagot :

[tex]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}][/tex]

The average speed of the delivery truck is about 45.45 miles per hour.