Plane 1 leaves city a at 7 am and flies at a speed of 250 mph in a straight line towards city b, located 1000 miles north of city a. plane 2 leaves city c located 300 miles east and 400 miles north of city a at 7: 30 am and flies west at a speed v mph. the planes fly at the same altitude. for which value of v do they collide ?

v=142.85 mph

Explanation:

Given

Distance between two cities is 1000 miles

Speed of plane 1 id 250 mph

Plane 1 leaves at 7 am and Plane 2 leaves at 7:30 am

They will collide if plane 2 travels 300 miles and Plane  1 travels 400 miles in t and t+0.5 hr  respectively

Time taken by plane 2

----1

time taken by plane  1 to travel 400 miles

-----2

substitute value of t in 2

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2