A rectangular field is 90 m by 70 m. A man walks around it at the rate of 4km per hour What time will he take in making 5 rounds
Answers
Answer: as he is walking around it so he is covering the perimeter of field
which is 2(l+b)= 2 (90+70)= 2*160=320m
as he walks 5 rounds, so 320*5=1600m=1.6km
he walks at 4km/hr so time taken= 1.6/4=2/5=0.4hr=40 minutes.
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Answer: 24 Minutes
Explanation:
Given:
Length = 90m
Breadth = 70m
Rate of walking = 4km/hr
To find: In the given question, we have to find out the time taken by man for making 5 rounds.
Perimeter of rectangular field = 2(length+breadth)
= 2(90+70)
= 2(160)
= 320
Therefore, Perimeter of rectangular field is 320m.
It is given that, Man walks at the rate of 4km/hr.
So, We have to convert it into km.
= 320/1000
= 0.320km
Time taken by person to walk 1 km = 4/60 (60 - Minutes)
Therefore, Distance travelled making
5 rounds = 5(0.320)
= 1.6
Therefore, Distance travelled for making 5 rounds = 1.6 km.
We have to find time taken for making 5 rounds by person.
= 1.6 * 15 (Person needs 15 min for 1km)
= 24
Hence, Person takes 24 minutes for completing 5 rounds in rectangular field.