Answer:
45 mph
Explanation:
Given: Distance travelled= 330 miles
Time taken= 6 h
Lets find out speed of car drove.
Formula;
![Speed= (Distance)/(time)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/h4an5bfbh2lxugqp3q8k8q4od8kjtricrb.png)
Speed=
![(330)/(6) = 55\ mph](https://img.qammunity.org/2020/formulas/mathematics/middle-school/qmzjy2p7b16879jz52tnypwkv5skekbigo.png)
∴ Car´s speed is 55 mph.
As we have been informed that car´s rate of travel slows by 10 mph
∴ we have to reduce the current speed of car by 10 mph;
![(55-10)= 45\ mph](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ovyf5u9xt50rp2z675s621pl46gllaapw1.png)
The new slower rate of travel is 45 mph.