25km east + 25km return+ 40km west + 40km return = 130km
Hope that helped :)
Answer: 310
Step-by-step explanation: 1240 miles /4 days = 310 miles per one day
The plane PRS passes through the points P, R and S. So it contains the line RS. Also the plane QRS passes through the points Q, R and S. So it contains the line RS as well. Since both the planes contain the line RS, the line RS must be the intersection of plane PRS and QRS