Question

A rectangular park is 100 m long and 50m wide. how many rounds are needed to cover the distance 1.2km.​

Answer 1

Answer: The perimeter of the park = 2 x (l + b)

= 2 × (150)

= 300m

Now, 1 km = 1000 m

∴ 1.2 km = 1200 m

∴ Total rounds = 1200m/300m = 4 rounds.

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Answer 2

Answer:

⇒ The radius of the flower beds 1 and 2=

2

100

=50m

⇒ Area of the flower beds 1 and 2 =2×(

2

1

πr

2

)

⇒ Area of the flower beds 1 and 2 =3.14×50×50=7850m

2

⇒ The radius of the flower beds 3 and 4 =

2

50

=25m

⇒ Area of the flower beds 3 and 4 =2×(

2

1

πr

2

)

⇒ Area of the flower beds 3 and 4 =3.14×25×25=1962.5m

2

⇒ Area of the all four flower beds =7850m

2

+1962.5m

2

=9812.5

⇒ Cost of levelling four flower beds =9812.5×0.60=Rs.5887.5

Explanation:

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