30 pts.

imee cycled from her home to the library at a speed of 12 km/h. she left her house at 21: 25 and arrived at the library at 22: 00. on her way back, she cycled along the same route, but increased her speed to 14 km/h. how many minutes did she take on the way back?

(need formula/solution asap. advanced .)

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.