A rectangular field is 72m by 58m.Keya walks around it at the rate of 3km per hour.How long will she take to make 3 rounds?
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Answered by
61
we need to find the perimeter of the field first.
P=2(72+58)=260M
SPEED=3KM/HR which needS to be converted into M/SEC 3*5/18=5/6M/SEC
SPEED=DISTANCE/TIME Now as we can see there are 3 rounds so multiply 3*distance=3*260=780
780/(5/6)=93.6sec=15.6min=2.6hr(hope you know the conversions of time)
P=2(72+58)=260M
SPEED=3KM/HR which needS to be converted into M/SEC 3*5/18=5/6M/SEC
SPEED=DISTANCE/TIME Now as we can see there are 3 rounds so multiply 3*distance=3*260=780
780/(5/6)=93.6sec=15.6min=2.6hr(hope you know the conversions of time)
Answered by
21
Answer:
Step-by-step explanation:
First we will find the distance she will cover when she makes the three rounds
Length of one round (perimeter of rectangle) = 2 (72 + 58) = 2(130) = 260m
Total length of three rounds = 3*260 = 780m = 780/1000 = 0.78km
Time to make three rounds = Distance/Speed = 0.78/3 = 0.26 hours = 15.6mins
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