Q:

A) 8 hrs 45 min | B) 8 hrs 42 min |

C) 8 hrs | D) 8 hrs 34 min |

Answer: D) 8 hrs 34 min

Explanation:

Explanation:

Number of pages typed by Adam in 1 hour = = 6

Number of pages typed by Smith in 1 hour = = 8

Number of pages typed by both in 1 hour = (6 + 8) = 14

Time taken by both to type 110 pages = (120 * 1/14) = 8 = 8 hrs 34 min.

Q:

A) 1/7 min | B) 7/2 min |

C) 5/7 min | D) 7/5 min |

Answer & Explanation
Answer: B) 7/2 min

Explanation:

Explanation:

Time taken to fill 2/7 = 1

Then to fill full 1 = ?

? = 1/(2/7) = 7/2 minutes.

2
184

Q:

A) 101 men | B) 112 men |

C) 102 men | D) 120 men |

Answer & Explanation
Answer: C) 102 men

Explanation:

Explanation:

From the above formula i.e (m1xt1/w1) = (m2xt2/w2)

so, (34x8x9/(2/5)) = (Mx6x9/(3/5))

so, M = 136 men

Number of men to be added to finish the work = 136-34 = 102 men.

2
219

Q:

A) 36 | B) 61 |

C) 48 | D) 54 |

2
300

Q:

A) 10 2/3 days | B) 13 1/5 days |

C) 12 2/3 days | D) 11 5/7 days |

Answer & Explanation
Answer: B) 13 1/5 days

Explanation:

Explanation:

3/15 + 4/16 + x/24 = 1

x = 66/5 = 13 1/5 days.

2
220

Q:

A) 8 hrs | B) 12 hrs |

C) 6 hrs | D) 4 hrs |

Answer & Explanation
Answer: C) 6 hrs

Explanation:

Explanation:

Suppose A, B and C take x, x/2 and x/3 respectively to finish the work.

Then, (1/x + 2/x + 3/x) = 1/2

6/x = 1/2 => x = 12

So, B takes 6 hours to finish the work.

2
268