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primary 6 | Maths
| Speed
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Date Posted: 4 years ago
Views: 295
duration from home to park
= d x 5 = 5d
duration from park to home
= d x 4 = 4d
9d = 54 = 54/60 = 0.9
d = 0.1 km = 100 m
duration from home to park
= 0.1 x 5 = 0.5 h = 30 min
...
= d x 5 = 5d
duration from park to home
= d x 4 = 4d
9d = 54 = 54/60 = 0.9
d = 0.1 km = 100 m
duration from home to park
= 0.1 x 5 = 0.5 h = 30 min
...
See 1 Answer
At 5km per hour and then 4km per hour, she takes 54 minutes.
Total of 4 + 5 = 9 units
When travelling at 5km per hour,
the ratio of time taken is the smaller of the 9 units, as she is travelling faster!
Finding the time taken to reach the park,
4/9 × 54 = 24 minutes
Total of 4 + 5 = 9 units
When travelling at 5km per hour,
the ratio of time taken is the smaller of the 9 units, as she is travelling faster!
Finding the time taken to reach the park,
4/9 × 54 = 24 minutes
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