6. A rectangular field is 72 m by 58 m. Amar walks round it at the rate of 3 km per hour. What time will he take in taking 2 rounds.
Answers
Answer:
The time taken to cover 2 rounds will be 0.173 hours
Step-by-step explanation:
Here the dimensions of the rectangular field is given to be 72 m by 58 m.
We will first find the perimeter of the field
perimeter = 2 ( length + breadth )
= 2 ( 72 + 58 )
= 260 m
In one round Amar will cover = 260 m
So, in two round he will cover = 260 × 2
= 520 m
520 m = 520/1000 km
= 0.52 km
Speedis give to be 3 km/hr
So, time = distance/speed
= 0.52/3
= 0.173 hours
Answer:
10.4 min
Step-by-step explanation:
First, convert all the given things into the same unit. So, 3km/hr. into m/min i.e. 50m/min.
Now, we know time = Distance / Speed
Hence , Time taken to complete 1 round = perimeter of the field /speed of Amar
= 2(l + b) /50
=260/50
= 5.2 min
Now, since He is taking 2 rounds, Time would be 2 times of 1 time taken during 1 round i.e. 10.4 min