Question

How long will a boy take to go 4 times round a circular field whose diameter is 140 m,walking at a speed of 4km/h ???? Plzzz give me solution of this question

Answer 1

Answer:

26.4

Given diameter = 420m. Then the radius will be r = 210m.

Given diameter = 420m. Then the radius will be r = 210m.Circumference = pi * diameter

Given diameter = 420m. Then the radius will be r = 210m.Circumference = pi * diameter                         = 22/7 * 420

Given diameter = 420m. Then the radius will be r = 210m.Circumference = pi * diameter                         = 22/7 * 420                         = 1320 m

Given diameter = 420m. Then the radius will be r = 210m.Circumference = pi * diameter                         = 22/7 * 420                         = 1320 m                         = 1.32km

Given diameter = 420m. Then the radius will be r = 210m.Circumference = pi * diameter                         = 22/7 * 420                         = 1320 m                         = 1.32kmTime taken = 1.320/3 (Given speed = 3 km/hr)

Given diameter = 420m. Then the radius will be r = 210m.Circumference = pi * diameter                         = 22/7 * 420                         = 1320 m                         = 1.32kmTime taken = 1.320/3 (Given speed = 3 km/hr)                   = .44 hr

Given diameter = 420m. Then the radius will be r = 210m.Circumference = pi * diameter                         = 22/7 * 420                         = 1320 m                         = 1.32kmTime taken = 1.320/3 (Given speed = 3 km/hr)                   = .44 hr      

Given diameter = 420m. Then the radius will be r = 210m.Circumference = pi * diameter                         = 22/7 * 420                         = 1320 m                         = 1.32kmTime taken = 1.320/3 (Given speed = 3 km/hr)                   = .44 hr                         = 26.4 minutes.