You'll have to use the sine ratio.
sin 51 = x/67
67 (sin 51) = x
52.07 = x
Hope this helps :)
Answer:
Her original speed is 54 mi/h
Step-by-step explanation:
Here, we want to calculate the original speed
Let this be x mi/h
Mathematically;
distance = speed * time
So she drove at a speed of x mi/h for 2 hours, then (x-10) mi/h for the remaining 1 hour for a total 152 mi journey
Mathematically, we can add up the journey parts as
x(2) + (x-10)1 = 152
2x + x - 10 = 152
3x = 152 + 10
3x = 162
x = 162/3
x = 54 mi/h
Total number of lollipops = 35
P(selects a grape ) = 10/35
P( then selects an apple) = 18/34
Required probability = 10/35 * 18/34 = 18/119 = 15.1% answer