15. What can we do minimize the use of plastics and deal with garbage? Give any three
reasons.
Answers
Answer:
Answer:
It will travel 60 km in 45 minutes.
Step-by-step explanation:
Given that:
A train is moving at a uniform speed of 80 km/hour.
To Find:
How far will it travel in 45 minutes?
There are two methods to solve this problem:
Using unitary method.
Using distance, time and speed formula.
Solving problem using unitary method:
∵ In 1 hour or 60 minutes distance covered = 80 km
∴ In 1 minute distance covered = 80/60 = 4/3 km
∴ In 45 minutes distance covered = (4 × 45)/3 = 60 km
Solving problem using formula:
We have,
Speed = 80 km/hour
Time = 45 minutes = 45/60 = 3/4 hour
Formula: Distance = Speed × Time
Distance = 80 km/hour × 3/4 hour
Distance = (80 × 3)/4 km
Distance = 60 km
Using both the methods we get the answer as 60 km.
Hence, we can say that a train will travel 60 km in 45 minutes.
Answer:
we can reduce the usage of plastics in the following ways
plastics should be banned
instead of using plastics, people should bring cloth bags as they are not harmful for the environment
if we are using plastics, it had to be made sure people do not litter around since animals unknowingly eat and die
THANK YOU