Question

A scooter starts with the speed of 70 km/h with its speed increasing every two hours by 10 km/h. in how many hours will it cover 345 km?

Answer 1

HEY MATE

HERE IS YOUR ANSWER:

Step-by-step explanation:

The motor car travelling at 70 km/hr will cover 70*2 = 140 km in 2 hours.

In the next 2 hours the speed is 80 km/hr. So the car covers 80*2 = 160 km in the next 2 hours. Thus the car has covered 300 km in 4 hours.

The remaining distance is 345–300 = 45 km. This distance is covered at a speed of 180 km/hr. The time taken to cover 45 km at 180 km/hr = 45/180 = 0.25 hr.

So the entire journey of 345 km is covered in 4.25 hours.

THANKS BE BRAINLY

Answer 2

hey mate

here is your Answer:

Step-by-step explanation:

Starting speed is 70km /hr

In first 2 hours it travels 140 km

For next 2 hr speed increases by 10km/hr so

70+10=80km/hr so 160km

Total distance travelled till now 140+160=300

In timw 4 hours it travelled 300km

Now speed is 90 km/hr

45 km remaining it will take half hour to travel it at 90km/hr

So for 345 km you will need 4 hours and 30 minutes time period.

THANKS

BE BRAINLY