What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

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

-- Traveling at 40 mph for 1 hour, the distance covered is 40 miles.

-- Traveling at 60 mph for 1 hour, the distance covered is 60 miles.

-- Total distance covered = (40 miles) + (60 miles) = 100 miles

-- Total time = (1 hour) + (1 hour)  =  2 hours

-- Average speed = (100 miles) / (2 hours)

Average speed = 50 miles per hour

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle