If the car went 30 km west in 25 min. and then 40 km south in 35 min., what would be its average speed?

Average speed  =  (distance covered) / (time to cover the distance)

                          =  (30km + 40 km)  /  (25min + 35min)

                          =        (70 km)  /  (60 min)

                          =             70 km/hour

the answer to this is proletariats.

hope this : )