Question

8. How long would a boy take to walk once round a circular park whose diameter is 420 m if his
speed is 3 km/h?

(guys the answer of this question is 26 minute 24 seconds Maine apni book me is question ka answer dekha but please give me step by step explanation that how 26 minutes 24 seconds is the answer please help me )
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Answer 1

Answer :

The boy will take 26 mins 24 secs to walk a round of the circular park.

Step-by-step explanation :

To Find,

• The time taken by the boy

Solution,

Given that,

• Diameter of the circular park = 420m [ Radius = 210, as radius = diameter / 2 ]
• Speed of the boy = 3 km/h

Therefore,

As we know that,

Circumference = 2πr, therefore,

➮ Circumference = 2 × 22/7 × 210

➮ 2 × 22 × 30

➮ 1320

Therefore, circumference of the circle is 1320m.

Now, the time will be taken by the boy is,

As we know that,

Time = Distance / Speed

➮ Time = 1.32 / 3 ..... [ 1320m = 1.32 km ]

➮ Time = 0.44 hours.

Converting it into minutes,

➮ 0.44 × 60

➮ 26.4 mins or 26 minutes 24 seconds

Hence, the boy will take 26 mins 24 secs to walk a round of the circular park.

Answer 2

Answer:

26 mins and 24 secs.

Step-by-step explanation:

view images for procedures.