Question

a complete 8 rounds of a circular track in 40 minutes if the diameter of the track is increased by 10 times then with the same speed how much time it will take to complwte a single road​

Answer 1

Answer:

Let, initial circumference be x m.

We Know,

    Circumference = π × Diameter

∴ Circumference ∝ Diameter

∴ When Diameter increases by 10 times, circumference is also increased by 10 times.

∴ Speed = 0.2x m/minute

New Circumference = 10x m

∴ Required Time taken = 50 minutes.

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Let the diameter of the circular track=d unit

Now, its perimeter = (pie)*d. unit

Now he completed 8 rounds in 40 minutes

Therefore his speed was=8(pie)d/40

=(pie*d) /5

Now Diameter is increased by 10 times

So it's perimeter will be=(pie) *(10d) unit

Time taken by him

=[(pie) *(10d)]/[(pie*d) /5] min

=50 minutes

HE NEEDS 50 MINUTES TO COMPLETE ONE ROUND......

HOPE THIS HELPS YOU....