The circumference of a circular garden is 1320m Find the area Outside the garden a road of 2m width ...........

Quantitative Aptitude ( CCS) Mensuration 2D

The circumference of a circular garden is 1320m.Find the area. Outside the garden , a road of 2m width runs around it .What is the area of this road and calculate the cost of gravelling it at the rate of 50 paise per sq. m .

2500.15 m2, Rs.1500.15

2652.57 m2, Rs.1326.285

2541.14 m2, Rs.1600.47

3245.78 m2,Rs.2000

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Explanation:

Circumference of the garden = 2*π*R = 1320
R= 210m
Outer radius = 210 +2= 212 m
Area of the road = π*(212)^a – π*(210)² = π*422*2 = 2652.57 m²
Therefore , cost of gravelling = 2652.57 * 0.5
= Rs.1326.285