Question

car travel 150 km in 2 hrs,200km in 5hrs,and 82km in 2hr .find the average speed. *​

Answer 1

MARK ME AS BRAINLIEST

150+200+82=432

Step-by-step explanation:

432:10=43km perhours

The estimated result of 432: 9 is approximately 430: 10 = 43

preliminary

Rules for estimating arithmetic operations:

a. Estimation to the nearest tens: Each number is rounded to the nearest ten. The result is just added, subtracted, multiplied, or divided according to the given arithmetic operation.

b. Estimation to the nearest hundreds: Each number is rounded to the nearest hundreds. The result is just added, subtracted, multiplied, or divided according to the given arithmetic operation.

Discussion

Determine the estimated result to the nearest tens

432 units digit is 2, rounded down to 30

9, rounded up to 10

So 432: 9 is about 430: 10 = 43

Answer 2

Answer:

48km/hr.

Explanation:

In the question we are given distance in 3case and time in 3case and we have to find the average speed.

We know that,

★ Avg. speed = Total distance coveres/Total time taken.

First we will find Total distance :-

D₁ = 150km.

D₂ = 200km.

D₃ = 82km.

Total distance = D₁ + D₂ + D₃

=> Total distance = 150 + 200 + 82

∴ Total distance = 432km.

Now, Total time :-

T₁ = 2hrs.

T₂ = 5hrs.

T₃ = 2hrs.

Total time = T₁ + T₂ + T₃

=> Total time = 2 + 5 + 2

∴ Total time = 9hrs.

Hence, we got total distance and time now we will calculate avg. speed as asked in the question.

Average speed :-

Average speed = (D₁ + D₂ + D₃)/(T₁ + T₂ + T₃)

∴ Average speed = Total distance covered/Total time taken

=> Average speed = 432/9

∴ Average speed = 48km/hr.

Thus, average speed of car is 48km/hr.