Question

1) Vrunda drives a car at a speed of 80 km/hour to cover a distance of
720 kms. If she drives at a speed of 90 km/hour, then how much time
will she save to cover the same distance ?​

Answer 1

Answer:

it save 1 hour because she drives 720km /9hours at 80km inone hour and 720km /8 hours in 90 km per hour

Answer 2

Answer:

1 hour

Step-by-step explanation:

first of all we need to find time of both cases

i.e

Case 1:-

speed of the car = 80km/h

distance to cover = 90km/h

so,time taken is

time = distance/ speed

i.e

= 720/80

=9 hours

Case 2:-

speed of the car = 90km/h

distance to cover = 720 km

so, time taken is

time = 720/90

= 8 hours

So,time saved = time taken in case 1 - time taken in case 2

i.e

time saved = 9-8

= 1 hours

therefore time saved is 1 hours