Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 9856 sq meters.

Area Problems
Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 9856 sq meters.

14m

56m

76m

16m

14m

56m

76m

16m

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clearly the cow will graze a circular field of area 9856 sq m and radius equal to the length of the rope.
Let the length of the rope be r mts then,
$r^{2}$ = 9856
$r^{2}$ = (9856 × 7) / 22 = 3136
r = 56 m

Area Problems
The radius of a circle is so increased that its circumference increased by 5%. The area of the circle, then increases by

10.5 %

10.25%

11.25%

12.5%

10.5 %

10.25%

11.25%

12.5%

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Area Problems
The length of a rectangular field is increased by 60 % . By what percent would the width have to be decreased to maintain the same area?

120%

371/2%

75%

60%

120%

371/2%

75%

60%

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Area Problems
A man runs round a circular field of radius 50m at the speed of 12 km/hr. What is the time taken by the man to take twenty rounds of the field?

230/7 min

90/7 min

110/7 min

220/7 min

230/7 min

90/7 min

110/7 min

220/7 min

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Area Problems
If the diagonal of a square is double, how does the area of the square change?

Becomes four fold

None of these

Becomes two fold

Becomes three fold

Becomes four fold

None of these

Becomes two fold

Becomes three fold

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Area Problems
The area of circle inscribed in an equilateral triangle is 154 sq cm. What is the perimeter of the triangle?

21 cm

21?3 cm

42 cm

42?3 cm

21 cm

21?3 cm

42 cm

42?3 cm

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Area Problems

Area Problems Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 9856 sq meters.

Area Problems The radius of a circle is so increased that its circumference increased by 5%. The area of the circle, then increases by

Area Problems The length of a rectangular field is increased by 60 % . By what percent would the width have to be decreased to maintain the same area?

Area Problems A man runs round a circular field of radius 50m at the speed of 12 km/hr. What is the time taken by the man to take twenty rounds of the field?

Area Problems If the diagonal of a square is double, how does the area of the square change?

Area Problems The area of circle inscribed in an equilateral triangle is 154 sq cm. What is the perimeter of the triangle?

Area Problems
Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 9856 sq meters.

Area Problems
The radius of a circle is so increased that its circumference increased by 5%. The area of the circle, then increases by

Area Problems
The length of a rectangular field is increased by 60 % . By what percent would the width have to be decreased to maintain the same area?

Area Problems
A man runs round a circular field of radius 50m at the speed of 12 km/hr. What is the time taken by the man to take twenty rounds of the field?

Area Problems
If the diagonal of a square is double, how does the area of the square change?

Area Problems
The area of circle inscribed in an equilateral triangle is 154 sq cm. What is the perimeter of the triangle?