Worksheet on Conversion of Units of Speed consists of converting the speeds from m/sec to km/hr and converting the speeds from km/hr to m/sec problems. If you are looking for the Practice Questions for Conversion of Units of Speed, you are at the correct place. Every question is given with the answer and explanation. So, without searching anywhere, you can clearly understand the complete concept of Conversion of Units of Speed.

Students can easily learn to convert different speed units by referring to Time and Distance Worksheets. Find the simple ways to convert km/hr to m/sec and m/sec to km/hr from this article. Simply, multiply 5/18 to km/hr to convert it into m/sec. Similarly, multiply 18/5 to m/sec to convert it into km/hr.

1. Convert each of the following speed into m/sec

(i) 162 km/hr (ii) 14.4 km/hr (iii) 216 km/hr (iv) 252 km/hr (v) 54 km/hr

## Solution:

(i) 162 km/hr

Given that 162 km/hr

To convert km/hr to m/sec, you need to multiply the given number with 5/18

Therefore, multiply 162 km/hr to 5/18

162 km/hr = 162 × (5/18)

162 km/hr = 45 m/sec

(ii) 14.4 km/hr

Given that 14.4 km/hr

To convert km/hr to m/sec, you need to multiply the given number with 5/18

Therefore, multiply 14.4 km/hr to 5/18

14.4 km/hr = 14.4 × (5/18)

14.4 km/hr = 4 m/sec

(iii) 216 km/hr

Given that 216 km/hr

To convert km/hr to m/sec, you need to multiply the given number with 5/18

Therefore, multiply 216 km/hr to 5/18

216 km/hr = 216 × (5/18)

216 km/hr = 60 m/sec

(iv) 252 km/hr

Given that 252 km/hr

To convert km/hr to m/sec, you need to multiply the given number with 5/18

Therefore, multiply 252 km/hr to 5/18

252 km/hr = 252 × (5/18)

252 km/hr = 70 m/sec

(v) 54 km/hr

Given that 54 km/hr

To convert km/hr to m/sec, you need to multiply the given number with 5/18

Therefore, multiply 54 km/hr to 5/18

54 km/hr = 54 × (5/18)

54 km/hr = 15 m/sec

2. Convert each of the following speed into km/hr

(i) 75 m/sec (ii) 90 m/sec (iii) 3.5 m/sec (iv) 20.5 m/sec (v) 140 m/sec

## Solution:

(i) 75 m/sec

Given that 75 m/sec

To convert m/sec to km/hr, you need to multiply the given number with 18/5

Therefore, multiply 75 m/sec to 18/5

75 m/sec = 75 × (18/5)

75 m/sec = 270 km/hr

(ii) 90 m/sec

Given that 90 m/sec

To convert m/sec to km/hr, you need to multiply the given number with 18/5

Therefore, multiply 90 m/sec to 18/5

90 m/sec = 90 × (18/5)

90 m/sec = 324 km/hr

(iii) 3.5 m/sec

Given that 3.5 m/sec

To convert m/sec to km/hr, you need to multiply the given number with 18/5

Therefore, multiply 3.5 m/sec to 18/5

3.5 m/sec = 3.5 × (18/5)

3.5 m/sec = 12.6 km/hr

(iv) 20.5 m/sec

Given that 20.5 m/sec

To convert m/sec to km/hr, you need to multiply the given number with 18/5

Therefore, multiply 20.5 m/sec to 18/5

20.5 m/sec = 20.5 × (18/5)

20.5 m/sec = 73.8 km/hr

(v) 140 m/sec

Given that 140 m/sec

To convert m/sec to km/hr, you need to multiply the given number with 18/5

Therefore, multiply 140 m/sec to 18/5

140 m/sec = 140 × (18/5)

140 m/sec = 504 km/hr

3. The speed of the bicycle is 72 km/hr, what is its speed in m/sec?

## Solution:

The speed of the bicycle is 72 km/hr.

To convert km/hr to m/sec, multiply the given number with 5/18.

72 km/hr = 72 × (5/18)

72 km/hr = 20 m/sec

4. Sam covers a distance of 1600 m in 2 minutes. Find his speed in km/hr.

## Solution:

Given that Sam covers a distance of 1600 m in 2 minutes.

Convert minutes into seconds.

1 minute = 60 seconds.

2 minutes = 2 × 60 = 120 seconds.

1600 m in 2 minutes = 1600 m in 120 seconds

1600/120 m/sec

To convert m/sec to km/hr, you need to multiply the given number with 18/5

Therefore, multiply 1600/120 m/sec to 18/5

1600/120 m/sec = (1600/120) × (18/5)

1600/120 m/sec = 48 km/hr

5. Which is greater – a speed of 288 km/hr or a speed of 85 m/sec?

## Solution:

Given that 288 km/hr and 85 m/sec.

To find which is greater in speed convert either one from km/hr to m/sec or m/sec to km/hr.

Convert 288 km/hr to m/sec

288 km/hr

To convert km/hr to m/sec, you need to multiply the given number with 5/18

Therefore, multiply 288 km/hr to 5/18

288 km/hr = 288 × (5/18)

288 km/hr = 80 m/sec

85 m/sec > 80 m/sec.

Therefore, 85 m/sec is greater than the 288 km/hr.

6. A car covers a distance of 200 km in the first two hours, 110 km in the next 2 hours, and 28 km in the next 1/2 hour. Convert the speed into m/sec.

## Solution:

The Total distance covered by the car = (200 + 110 + 28) km = 338 km

Total time taken = (2 + 2 + 1/2) hr = (4 + 4 + 1)/2 = 9/2 hr

Average speed = Distance covered/Time taken

= 338 km/(9/2 hr)

= 338 × (2/9) km/hr

= 75.11 km/hr

To convert km/hr to m/sec, multiply the given number with 5/18.

75.11 km/hr = 75.11× (5/18)

75.11 km/hr = 20.86 m/sec

7. The speed of a cyclist is 8 m/sec. find the speed in km/hr.

## Solution:

The speed of a cyclist is 8 m/sec.

To convert m/sec to km/hr, you need to multiply the given number with 18/5

Therefore, multiply 8 m/sec to 18/5

8 m/sec = 8 × (18/5)

8 m/sec = 28.8 km/hr