Question : Shivi drives her car in three different ways to reach the destination. Determine the average speed during this journey.
| Way | Speed (km/hr) |
Distance (km) |
| A | 38 | 114 |
| B | 42 | 84 |
| C | 46 | 230 |
Option 1: 42.8 km/hr
Option 2: 41.5 km/hr
Option 3: 43.5 km/hr
Option 4: 41.8 km/hr
Correct Answer: 42.8 km/hr
Solution :
Time taken by Shivi on the way to A = $\frac{114}{38}$ = 3 hr
Time taken by Shivi on the way to B = $\frac{84}{42}$ = 2 hr
Time taken by Shivi on the way to C = $\frac{230}{46}$ = 5 hr
So, the total time = (3 + 2 + 5) = 10 hr
Now, the total distance = (114 + 84 + 230) = 428 km
$\therefore$ Required average speed = $\frac{428}{10}$ = 42.8 km/hr
Hence, the correct answer is 42.8 km/hr.
Related Questions
Question : Calculate the mean from the following table.
| Scores | Frequencies |
| 0-10 | 2 |
| 10-20 | 4 |
| 20-30 | 12 |
| 30-40 | 21 |
| 40-50 | 6 |
| 50-60 | 3 |
| 60-70 | 2 |
Option 1: 33.4
Option 2: 32.6
Option 3: 35.8
Option 4: 34.2
Question : Study the given table and answer the question that follows.
| Number of children | Number of families |
| 0 | 4 |
| 1 | 22 |
| 2 | 15 |
| 3 | 6 |
| 4 | 2 |
The average number of children per family is :
Option 1: 1.47
Option 2: 1.59
Option 3: 1.23
Option 4: 1.72
Question : The following table shows the number of centuries scored by cricketers in the past 5 years.
| Cricketers | Years | 2021 | 2020 | 2019 | 2018 | 2017 |
| A | 1 | 0 | 2 | 1 | 1 | |
| B | 1 | 2 | 0 | 0 | 1 | |
| C | 0 | 0 | 1 | 1 | 0 | |
| D | 0 | 1 | 1 | 0 | 1 | |
| E | 1 | 0 | 1 | 0 | 1 |
In which year the maximum number of centuries were scored?
Option 1: 2020
Option 2: 2018
Option 3: 2019
Option 4: 2021
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 3 | 2 | 38 | 5 |
| 5 | 3 | ? | 4 |
| 7 | 1 | 54 | 2 |
Option 1: 48
Option 2: 52
Option 3: 40
Option 4: 50
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
| 46 | 12 | 30 | 28 |
| 32 | 16 | ? | 30 |
| 54 | 10 | 29 | 35 |
Option 1: 20
Option 2: 16
Option 3: 22
Option 4: 18
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