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The areas of two circular fields are in the ratio 16 : 49. If the radius of the bigger field is 14 m, then what is the radius of the smaller field? |

A) 4 m B) 8 m C) 9 m D) 10 m Correct Answer :8 m Explanation :Let r As is given, Ratio of area πr |

If each of the dimensions of a rectangle is increased by 200%, the area is increased by? |

A) 300% B) 400% C) 600% D) 800% Correct Answer :800% Explanation :Let the length and width of the rectangle are x and y respectively. Now, Length and Width of rectangle after increasing by 200% New area = 3x*3y = 9xy Percentage increase in area = (9xy-xy)*100 / xy = 800 % |

A copper wire when bent in the form of a square encloses an area of 121 cm |

A) 121 cm B) 144 cm C) 154 cm D) 168 cm Correct Answer :154 cm Explanation :As is given, area of square = a length of the wire = Perimeter of square of side a = 4a = 4*11 = 44cm Let the radius of circle be r cm. Then, Now, Area of circle = πr |