A) 1.8 kmph | B) 2 kmph |

C) 2.2 kmph | D) 1.5 kmph |

Explanation:

Speed of Boy is B = 4.5 kmph

Let the speed of the stream is S = x kmph

Then speed in Down Stream = 4.5 + x

speed in Up Stream = 4.5 - x

As the distance is same,

=> 4.5 + x = (4.5 - x)2

=> 4.5 + x = 9 -2x

3x = 4.5

x = 1.5 kmph

A) Rs. 4680 | B) Rs. 4420 |

C) Rs. 4960 | D) Rs. 5480 |

Explanation:

Let the expenditure on the 95 students be 'x'

Then,

95x + 500 = 120(x – 5)

95x + 500 = 120x - 600

120x - 95x = 1100

25x = 1100

=> x = 44

Therefore, total expenditure of the hostel becomes

95 x 44 + 500 = 4680.

A) JxJ = KL | B) KxK= JL |

C) LxL = JK | D) JKL = 1 |

Explanation:

Let the Time be 'N' and Rate be 'R'

J = (K x NR)/100 K = (L x NR)/100

J/K = NR/100 K/L = NR/100

J/K = K/L

= JL

A) Narendra Modi | B) Arun Jaitley |

C) M. Venkaiah Naidu | D) Harsh Vardhan |

Explanation:

The Union Minister for Science & Technology Dr. Harsh Vardhan has launched a mobile app “Celebrating Yoga” in New Delhi to connect people through Yoga for scientific healthy living. The mobile app has been developed by Department of Science & Technology on the occasion of International Yoga Day (IYD) 2017. The aim of the app is to popularize Yoga and encourage people to practice yoga for a scientifically healthy living.

A) Mumbai | B) Haldia |

C) Vishakapatnam | D) Ennore |