Question

An object completes one round of a circle of radius 7 m in 20 seconds. Distance travelled after 10 seconds is

Answer 1

Distance travelled = 2πr

=> 44m

speed = 44/20 = 2.2 m/s

Distance travelled in 10 s = 10 ×2.2 = 22m


Total distance = 44 +22 = 66 metres

Answer 2

Solution :

Given that, An object completes one round of a circle of radius 7 m in 20 seconds.

So, We have to find the Circumference of Circle because It will give us Distance travelled by an object.

Circumference of Circle = 2πr

 Circumference of Circle = 2×22/7×7 Circumference of Circle =44 m

Now, According to the Question's Statement!

Distance travelled by an object = Speed × time

44 = Speed × 20

Speed = 2.2 m/s

Now, Distance travelled by an object after 10 Second = 2.2 × (20+10)

Distance travelled by an object after 10 Second= 66  m

Therefore, Required Distance travelled by an object after 10 Second will be 66 m .