Question

Nagma runs around a rectangular park 180m long and 120m wide at the rate of 7.5km/hour. In how much time will she complete five rounds

Answer 1

Answer:

0.4 hours

Step-by-step explanation:

find the perimeter:

180+180+120+120=600m

next, convert km to m:

7.5 x 1000=7500m

it says 5 rounds so:

600*5=3000m

make a ratio:

7500m:1hr=3000m: n hrs

7500n = 3000 * 1

7500n=3000

n=3000/7500

n=o.4 hours

Answer 2

Answer:

24 mins

Step-by-step explanation:

First, we will find the perimeter of the park and then the time taken by Nagma:

P = 2(l + b)

  = 2 × (180 + 120)

  = 2 × 300

  = 600 m

It says 5 rounds, so:

600 × 5 = 3000 m or 3 km

Now, we will find the time taken:

Time = Distance/Speed

        = 3/7.5

        = 2/5 hours or 24 mins

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