Question

mukesh walks around a circular track of radius 14mwith a speed od 4km/hr.If he takes 30rounds of the track for how long does he walk​

Answer 1

Answer:

= 26.4 minutes

Step-by-step explanation:

Total length covered : 2πr×20

= 2×22/7×14×20

= 1760metres = 1.76km

Speed =4km/hr

Time = 1.76/4

= 0.44hours

= 26.4 minutes

Answer 2

Answer

• It would take Mukesh 40 minutes to complete the walk

Explanation

We are given that

• Radius of park = 14 m
• Speed with which mukesh goes = 4 km/h
• Number of rounds = 30

Then we got to find

• The time taken?

━━━━━━━━━━━━━━━━

We shall first find the circumference of the Circle which is given by,

⨳ Circumference = 2πr

Substituting the values,

➝ 2 × 22/7 × 14

➝ 2 × 22 × 2

➝ Circumference = 88 m

For 30 rounds the distance will be,

➝ 88 × 30

➝ Distance = 2640 m

Then convet the speed from km/h to m/s

➝ 4 × 5/18

➝ Speed = 1.1 m/s

Then the total time taken will be,

➝ Speed = Distance/Time

• Speed = 1.2 m/s
• Distance = 2640 m
• Time = ?

➝ 1.2 = 2640/Time

➝ Time = 2640/1.1

➝ Time = 2400 seconds

Then we may convet it to minutes,

➝ 1 min = 60 seconds

➝ 2400 = 2400/60

➝ Time = 40 minutes