Mensuration Practice Test 9

Question : 35 of 40

Marks: +1, -0

In a circular field, there is a rectangular tank of length 130 m and breadth 110 m. If the area of the land portion of the field is 20,350

m^2

, then the radius of the field is:

Solution:

Area of the rectangular tank
= l × b
= 130 × 100
= 1,43,000

m^3

Area of the land = 20,350

m^3

Total area of the circular field
= 14,300 + 20,350 = 34,650

m^2

Area of the circle = 34,650

m^2

$πr^24 = 34,650

r^2

{34650×7}/{22}

{242550}/{22}

r^2

= 11025
r = 105 m

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