Convert the following lengths.
Example 1 :
480 cm to m
Solution :
1 cm = 1/100 m
480 cm = (480)/100 m
= 4.8 m
Example 2 :
54 mm to cm
Solution :
1 mm = 1/10 cm
54 mm = (54)/10 cm
= 5.4 cm
Example 3 :
5280 m to km
Solution :
1 m = 1/1000 km
5280 m = (5280)/1000 km
= 5.28 km
Example 4 :
2000 mm to m
Solution :
1 mm = 1/1000 m
2000 mm = (2000)/1000 m
= 2 m
Example 5 :
580000 cm to km
Solution :
1 cm = 1/100000 km
580000 cm = (580000)/100000 km
= 5.8 km
Example 6 :
7000000 mm to km
Solution :
1 mm = 1/1000000 km
7000000 mm = (7000000)/1000000 km
= 7 km
Example 7 :
Mike ran 8.5 km while mal walked 3200 m. How much farther did Mike run than Mal walk ?
Solution :
Mike runs = 8.5 km
Mal walks = 3200 m
We need to know mike runs (in meters).
8.5 km to m
1 km = 1000 m
8.5 km = (8.5 × 1000) m
= 8500 m
Difference between mile run and mal walk = (8500 - 3200)m
= 5300 m
Converting m to km,
1 m = 1/1000 km
5300 m = (5300)/1000 km
= 5.3 km
So, 5.3 km Mike ran than Mal walked.
Example 8 :
I have 45 coils of fencing wire and each coil is 275 m long. How many kilometres of wire do I have ?
Solution :
Total length of coil wire = Number of coil wire × Each length of wire
= 45 × 275
= 12375 m
Converting m to km,
1 m = 1/1000 km
12375 m = (12375)/1000 km
= 12.375 km
I have 12.375 km of wire.
Example 9 :
Liesel swims eighty 25 m laps in 1 hour. If she continues to swim at that speed, how many kilometres will she swims in 3 hours ?
Solution :
Liesel swims in 1 hour = 80(25) m
= 2000 m
she swims in 3 hours = 2000 × 3
= 6000 m
Converting m to km,
1 m = 1/1000 km
6000 m = (6000)/1000 km
= 6 km
she will swim 6 km in 3 hours.
Example 10 :
John has 3.85 km of copper wire and needs to cut it into 1.5 cm lengths to be used in electric toasters. How many lengths can he make ?
Solution :
John has 3.85 km of copper wire.
Converting km to m,
1 km = 100000 cm
3.85 km = (3.85 × 100000) cm
= 385000 cm
He needs to cut it into 1.5 cm lengths.
Required lengths = (385000)/1.5
= 256666
He can make 256666 lengths.
May 21, 24 08:51 PM
May 21, 24 08:51 AM
May 20, 24 10:45 PM