Q:

A) 65.25 | B) 56.25 |

C) 65 | D) 56 |

Answer: B) 56.25

Explanation:

Explanation:

let each side of the square be a , then area = ${a}^{2}$

As given that The side is increased by 25%, then

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

New area = ${\left(\frac{5a}{4}\right)}^{2}$

Increased area= $\frac{25{a}^{2}}{16}-{a}^{2}$

Increase %=$\frac{\left[9{a}^{2}/16\right]}{{a}^{2}}*100$ % = 56.25%

0
0

2
66

2
48

Q:

A) 40/3% | B) 20% |

C) 25% | D) 27% |

Answer & Explanation
Answer: C) 25%

Explanation:

Explanation:

Let the breadth of the rectangle = x

Length of the the rectangle will be = 3 times of breadth = 3x

So the initial perimeter = 2(length + breadth) = 2(x + 3x) = 8x

New breadth after increase = x + 10x/100 = 1.1x

New length after increase = 3x + 30*3x/100 = 3.9x

New perimeter = 2(1.1x + 3.9x) = 10x

Percentage change in perimeter = ( 10x-8x)*100/8x = 25%

8
160

Q:

A) √245 cm | B) √255 cm |

C) √265 cm | D) √275 cm |

Answer & Explanation
Answer: C) √265 cm

Explanation:

Explanation:

Hypotenuse = 10cm

Let the other 2 perpendicular sides be a and b

Area ½ a*b = 24

So a*b = 48 cm^2

Also using Pythagoras

2
161

Q:

A) 1 + 2/√3 | B) 1 - 2/√3 |

C) 2 + 2/√3 | D) 2 |

2
132

0
124

10
329