Question

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

Answer 1

distance=2×300=600*5=3000

speed=7.5*5/18

time=(3000*18)/7.5*5=1440 sec=24 min

Answer 2

Nagma will complete five rounds in 24 minutes.

Step-by-step explanation:

It is given that,

Length of rectangular park = 180 m

Width of rectangular park = 120 m

Perimeter of the park is

$Perimeter=2(length+width)$

$Perimeter=2(180+120)$

$Perimeter=2(300)$

$Perimeter=600$

We needs to find the time taken by Nagma to complete 5 rounds.

1 round = 600 m

5 round = 5×600 = 3000 m = 3 km

Speed of Nagma is 7.5 km/hour.

$Time=\dfrac{Distance}{Speed}$

$Time=\dfrac{3}{7.5}$

$Time=0.4$

Nagma will complete five rounds in 0.4 hours.

We know that 1 hour = 60 minutes.

0.4 hours = 0.4×60 = 24

Therefore, Nagma will complete five rounds in 24 minutes.

#Learn more

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