The inner circumference of a circular track is 440 m. The track is 14 cm wide. Find the cost of leveling it at 20 paise/square m.
Also find the cost of fencing along outer circle at Rs.2/meter.
Answers
Answered by
8
ATQ, 2*22/7*r=440
or,r=70m. d=140m.
outer d=140+.14=140.14
area of inner circle=22/7*r^2=15400 sq.m and area of outer circle=πr^2=15909.54sq.m
area of the path=15909.54-15400=509.54sq.m*20=rs.1019.8
circum. of outer circle=2πr=440.44
costing=440.44*2=rs.880.88
or,r=70m. d=140m.
outer d=140+.14=140.14
area of inner circle=22/7*r^2=15400 sq.m and area of outer circle=πr^2=15909.54sq.m
area of the path=15909.54-15400=509.54sq.m*20=rs.1019.8
circum. of outer circle=2πr=440.44
costing=440.44*2=rs.880.88
Anonymous:
please mark my answer as brainiest answer.................................
I hope it will help u
if so then please mark it
Similar questions