Question

a car moves with a speed of 40km/h for 15 minutes and then with a speed of 60m/h for the next 15 minutes. the total distance covered by the car is: ​

Answer 1

★Given:-

• A car moves with a speed of 40km/h for 15 minutes
• With a speed of 60km/h for the next 15 minutes.

★To find:-

• Total distance covered by the car

★Solution:-

Using the formula,

✦Distance = speed × time taken

Distance covered in the 1st 15min :-

Given,

• Speed = 40kmph

→Time = 15min

Converting minutes to hours,

➾60 minutes = 1 hour

➾15 minutes = 15/60 hours

Therefore,

• Time = 0.25hrs

Putting values in the formula,

➾Distance = speed×time

➾40×0.25

➾10km

Distance covered in the next 15min :-

Given,

• Speed = 60kmph

→Time = 15min

Converting minutes to hours,

➾60 minutes = 1 hour

➾15 minutes = 15/60 hours

Therefore,

• Time = 0.25hrs

Putting values in the formula,

➾Distance = speed × time

➾60 × 0.25

➾15km

Total distance covered:-

➾Distance covered in the first 15min + next 15min

➾10 + 15

➾25km

Therefore,the total distance covered by the car is 25km.

______________

Answer 2

Given :-

• A car moves with a speed of 40km/h for 15 minutes
• With a speed of 60m/h for the next 15 minutes.

To find :-

• Total distance covered by the car

Solution :-

• Using the formula

Distance = speed × time taken

Distance covered in the 1st 15m :-

Given :-

• Speed = 40kmph

★ Time = 15min

Converting minutes to hours,

● 60 minutes = 1 hours

● 15 minutes = ${\bf{\frac{15}{16} \: hours}}$

Therefore,

• Time = 0.25 hrs

Putting values in the formula,

● Distance = speed × time

● 40 × 0.25

● 10 km

Distance covered in the next 15 min :-

Given :-

• Speed = 60 kmph

★ Time = 15min

Converting minutes to hours,

● 60 minutes = 1 hours

● 15 minutes = ${\bf{\frac{15}{60} \: hours}}$

Therefore,

• Time = 0.25 hrs

Putting values in the formula,

● Distance = speed × time

● 60 × 0.25

● 15 km

Total distance covered :-

★ Distance covered in the first 15 min + next 15 min

● 10 + 15

● 25 km

Therefore,

• The total distance covered by the car is $\boxed{\bf{25~km}}$