Question

If a car previously traveled at 15.0 mph but now covers the same distance in half the time, calculate its speed.

Answer 1

15 mph x 2 = 30 MPH

30 MPH

Hope it helps!

Answer 2

Answer: New speed of car is 30.0 mph

Step-by-step explanation:

Since speed is equal to the distance traveled divided by time taken ,i.e.,

Speed ,
`Speed (V)=(Distance (D))/(Time(T))`

Case 1

`V_1=15 mph , Distance = D_1,time=T_1`

=>
`15 mph =(D_1)/(T_1)`

Case 2

`V_2=? mph, D_2=D_1 , T_2=(T_1)/(2)`
`=0.5T_1`

=>
`V_2=(D_2)/(T_2)=(D_1)/(.5T_1)=2V_1`

=>
`V_2=2V_1=2* 15 mph=30mph`

Thus new speed of car is 30.0 mph