# Ram goes for a morning walk in a circular park daily he completes 1 revolution of the park in 4m.Find out his speed if the diameter of the park is 420m.

2
by Bhavya11

Log in to add a comment

by Bhavya11

Log in to add a comment

We know that circumference of a circle = π × diameter

⇒22/7 ×420

⇒1320.

Therefore distance = 1320m

Given time = 4 min = 4 × 60 sec = 240 sec

Now , speed = distance / time = 1320/240 = 5.5 m/sec

RADIUS = 420 / 2 = 210 m

DISTANCE COVERED IN 1 REVOLUTION = CIR. OF CIRCLE

= 2 * 22/7 * r

= 44/7 * 210

= 1320 m

TIME TAKEN = 4 minutes = 4 * 60 s = 240 s

SPEED = DISTANCE / TIME

= 1320 / 240

= 5.5 m/s