Question

22. Ashok completes a complete round of a
What is his speed?
circular park of radius 70 m in 3 minutes. 13. 0.35
17. 0.8
21. 2.8​

Answer 1

Appropriate Question:

• Ashok completes a complete round of a circular park of radius 70 m in 3 minutes. What is his speed?

Answer:

His speed is 2.44 m/s.

Explanation:

As per the provided information in the given question, we have :

• Distance (s) ⇒ Distance covered to take one round of the circular park
• Time (t) ⇒ 3 minutes
• [Radius of the park is 70m].

We are asked to find his speed.

★ Calculating distance :

Since he took one round of a park. So, circumference or length of the boundary is the total distance covered by him.

➝ Circumference of the park = 2πr

Substituting the given values.

➝ Circumference of the park = 2 × $\sf \dfrac{22}{7}$ × 70 m

Cancelling or dividing 70 by 7.

➝ Circumference of the park = (2 × 22 × 10) m

Multiplying the values.

➝ Circumference of the park = 440 m

$\therefore$ Distance covered by him is 440 m.

★ Calculating time in its SI unit :

➝ Time = 3 minutes

• 1 minute = 60 seconds

➝ Time = (3 × 60) seconds

➝ Time = 180 seconds

$\therefore$ Time taken by him is 180 seconds.

★ Calculating speed attained by him :

As we know that,

$\longrightarrow\underline{ \boxed { \sf {Speed= \dfrac{Distance}{Time} }}}$

Substituting the required values.

$\longrightarrow \sf { Speed= \dfrac{440 \;m}{180 \; s} }$

$\longrightarrow \sf { Speed= \dfrac{220 \;m}{90 \; s} }$

$\longrightarrow \sf { Speed= \dfrac{110 \;m}{45 \; s} }$

$\longrightarrow \sf { Speed= \dfrac{22 \;m}{9 \; s} }$

$\longrightarrow \underline{ \boxed{ \sf { Speed= 2.44 \; ms^{-1} }}} \; \bigstar$

$\therefore$ Speed of Ashok is 2.44 m/s.

Answer 2

Answer:

Your Correct answer is 2.44 m/s

Explanation:

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