# Exams

A) 100% | B) 200% |

C) 300% | D) 400% |

Explanation:

Let the C.P be Rs.100 and S.P be Rs.x, Then

The profit is (x-100)

Now the S.P is doubled, then the new S.P is 2x

New profit is (2x-100)

Now as per the given condition;

=> 3(x-100) = 2x-100

By solving, we get

x = 200

Then the Profit percent = (200-100)/100 = 100

Hence the profit percentage is 100%

A) Kadphises I | B) Kanishka |

C) Alexander | D) Menander |

Explanation:

The Saka Era was founded by Kanishka, the emperor of Kushana empire from the year 78 A.D.

A) Ganga | B) Yamuna |

C) Indus | D) Ravi |

Explanation:

Two sub groups of Himalayan Rivers are Trans Himalayan Rivers and Himalayan Rivers.

**Trans Himalayan Rivers :**

These rivers originate beyond the Himalayas. They are** The Indus, The Sutlej **and** The Brahmaputra Rivers.**

**Himalayan Rivers :**

These are the rivers originate from Himalayas. They are** The Ganga, The Yamuna and their tributaries.**

A) 110 | B) 120 |

C) 130 | D) 140 |

Explanation:

let length = x and breadth = y then

2(x+y) = 46 => x+y = 23

x²+y² = 17² = 289

now (x+y)² = 23²

=> x²+y²+2xy= 529

=> 289+ 2xy = 529

=> xy = 120

area = xy = 120 sq.cm

A) 55% | B) 65% |

C) 75% | D) 85% |

Explanation:

Let original radius = R.

New radius = $\frac{50}{100}R$= $\frac{50}{100}R$

Original area =$\frac{R}{2}$ and new area = ${\mathrm{\pi R}}^{2}$

$\frac{3{\mathrm{\pi R}}^{2}}{4}*\frac{1}{{\mathrm{\pi R}}^{2}}*100$

Decrease in area = $\mathrm{\pi}{\left(\frac{\mathrm{R}}{2}\right)}^{2}=\frac{{\mathrm{\pi R}}^{2}}{4}$ = 75%

A) Diffraction of light | B) Dispersion of light |

C) Reflection of light | D) Refraction of light |

Explanation:

A clear cloudless day-time sky is blue because molecules in the air dissipate blue light from the sun more than they dissipate red light. When we look towards the sun at sunset, we see red and orange hues on the grounds because the blue light has been scattered out and away from the line of sight.

A) USA | B) Fiji |

C) India | D) UK |

Explanation:

Golf player Vijay Singh is an Indo-Fijian belongs to Fiji. He was born in 1963, who was number 1 in the Official World Golf Ranking for 32 weeks in 2004 and 2005.

He was nicknamed as "The Big Fijian", has won three major Golf Championships. He has started his profession career from 1984.

A) 0.754 | B) 0.854 |

C) 0.954 | D) 0.654 |

Explanation:

log 27 = 1.431

log$\left({3}^{3}\right)$ = 1.431

3 log 3 = 1.431

log 3 = 0.477

log 9 = log(${3}^{2}$)= 2 log 3 = (2 x 0.477) = 0.954