Q:

A) 4 days | B) 5 days |

C) 6 days | D) 7 days |

Answer: C) 6 days

Explanation:

Explanation:

Work donee by A and B in the first two hours, working alternatively = First hour A + Second hour B = (1/4) + (1/12) = 1/3.

Thus, the total time required to complete the work = 2 (3) = 6 days

1
31

0
55

1
138

2
224

1
279

Q:

A) 40 : 61 | B) 63 : 40 |

C) 20 : 30 | D) 33 : 20 |

2
3316

Q:

A) 4 days | B) 3 days |

C) 40 days | D) 100 days |

7
750

6
789