## if alexandra increases her usual driving speed by 15 km/h, it will take her 2 hours less to make a trip to her gradnparents house. If she de

Question

if alexandra increases her usual driving speed by 15 km/h, it will take her 2 hours less to make a trip to her gradnparents house. If she decreaseshe rusualy speed by 15 km/h, it will take her 3 h more than usualy to make the trip. How long is the trip?

in progress 0
2 weeks 2021-09-11T00:11:30+00:00 1 Answer 0

Therefore,

Distance of the trip is Step-by-step explanation:

Let “x” be the Speed of the car and,

“y” be the time to cover the trip to her grandparents,

To Find:

How long is the trip = ?

Solution:

We Know that, According to the First given condition,  According to the Second given condition,  As we  know Distance will remain same so we have Substituting the values we get So on  Substituting we have  …………..Equation ( 1)

Again on  Substituting we have  ………..Equation ( 2)

Subtracting Equation 1 from equation 2 we get Substitute y = 12 in equation 1 we get So we have now,  Therefore the Distance of the trip is Therefore,

Distance of the trip is 