harry drove for 4 hours on the freeway , he decreased his speed by 20 mph than drove for 5 hours on the country road. If his total trip was 449 miles, than what was his speed on the freeway
distance = speed * time, so if his freeway speed was s, then
4s + 5(s-20) = 449
Freeway speed
Country road speed
4r + 5(r-20) =449
4r +5r -100 =449
9r = 549
r = 61
Freeway 61 mph
Harry drove for 3 hours on the freeway, then decreased his speed by 20 miles per hour and drove for 6 more hours on a county road. If his total trip was 330 miles, than what was his speed on the freeway?
To find out Harry's speed on the freeway, we can use the formula: Speed = Distance / Time.
Let's denote the speed on the freeway as 'x' mph.
Given that Harry drove for 4 hours on the freeway, the distance he covered can be calculated as 4x miles.
Next, we are told that he decreased his speed by 20 mph and drove for 5 hours on the country road. Therefore, his speed on the country road would be (x - 20) mph, and the distance covered on the country road would be 5(x - 20) miles.
According to the problem, the total distance covered for the entire trip was 449 miles. So, we can set up the equation:
4x + 5(x - 20) = 449
Simplifying the equation:
4x + 5x - 100 = 449
9x - 100 = 449
9x = 449 + 100
9x = 549
Dividing both sides of the equation by 9:
x = 549 / 9
x ≈ 61
Therefore, Harry's speed on the freeway was approximately 61 mph.