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If the length of a certain rectangle is decreased by 4 cm and the width is increased by 3 cm, a square with the same area as the original rectangle would result. Find the perimeter of the original rectangle? |

A) 40 cm B) 50 cm C) 60 cm D) 30 cm Correct Answer :50 cm Explanation :Let x and y be the length and breadth respectively.
for a square, length = width Solving eq (i) & (ii) x= 16 and y = 9 |

If the ratio of areas of two square is 225:256, then the ratio of their perimeters is? |

A) 256:225 B) 225:256 C) 16:15 D) 15:16 Correct Answer :15:16 Explanation :Let the side of squares be x and y respectively. Then Ratio of their perimeters = 4x / 4y = x / y = 15 / 16 |

The circumference of the semi-circle is 180 cm. If the side of a square is 60% more than the diameter of the circle, what is the perimeter of the square? |

A) 368 cm B) 464 cm C) 486 cm D) 448 cm Correct Answer :448 cm Explanation :Given that circumference of semi circle is = 180 Diameter of this semi circle, D = 2*R Now, Side of the square = 160/100 D = 160/100 * 2R = 3.2*R Perimeter of square = 4 * Side of the square = 4*3.2*R = 448 |