# Area Questions

Q:

A) 65.25 | B) 56.25 |

C) 65 | D) 56 |

Answer & Explanation
Answer: B) 56.25

Explanation:

Explanation:

let each side of the square be a , then area = a x a

New side = 125a / 100 = 5a / 4

New area =(5a x 5a) / (4 x 4) = (25a²/16)

increased area== (25a²/16) - a²

Increase %= [(9a²/16 ) x (1/a² ) x 100]% = 56.25%

107
20037

Q:

A) 55% | B) 65% |

C) 75% | D) 85% |

Answer & Explanation
Answer: C) 75%

Explanation:

Explanation:

Let original radius = R.

New radius = =

Original area = and new area =

Decrease in area = = 75%

29
10037

Q:

A) 30 | B) 40 |

C) 50 | D) 60 |

Answer & Explanation
Answer: A) 30

Explanation:

Explanation:

Let the side of the square(ABCD) be x meters.

Then, AB + BC = 2x metres.

AC = = (1.41x) m.

Saving on 2x metres = (0.59x) m.

Saving % = = 30% (approx)

21
8705

Q:

A) 18 | B) 28 |

C) 38 | D) 48 |

Answer & Explanation
Answer: A) 18

Explanation:

Explanation:

(or)

Also,

= 41 + 40 = 81

(l + b) = 9.

Perimeter = 2(l + b) = 18 cm.

103
6689

Q:

A) 110 | B) 120 |

C) 130 | D) 140 |

Answer & Explanation
Answer: B) 120

Explanation:

Explanation:

Other side = [(17 x 17) - (15 x 15)] = (289 - 225) = 8m

Area = 15 x 8 =120 sq. m

27
6519