Mensuration Practice Test 10

Question : 2 of 40

Marks: +1, -0

A fountain whose diameter is 70 m is surrounded by a 2 m wide circular grass walk. Find the area of the grass walk?

Solution:

Area of fountain =

π(35)^2

Complete area =

π(37)^2

Area of grass walk =

π(37)^2 - π(35)^2

{22}/7 (1369-1225)

{22}/7 × 144

= 453

m^2

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