It takes 3 hour 15 minutes to fly from city a to city b at constant speed. Find how long the journey takes if A) the speed is 1×1÷2 times of the original speed and
B) if the speed is three-quarters of the original speed.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

1/2*qr*rs

step-by-step explanation:

no solution

step-by-step explanation:

there is not enough information in the problem to solve.

80

step-by-step explanation: