Q:

A) 18 minutes | B) 19 minutes |

C) 22 minutes | D) 24 minutes |

Answer: C) 22 minutes

Explanation:

Explanation:

Let the two conditioners be A and B

'A' cools at 40min

'B' at 45min

Together = **(a x b)/(a + b)**

= (45 x 40)/(45 + 40)

= 45 x 40/85

= 21.1764

= **22 min** (approx).

12
1599

6
1219

2
1267

2
919

3
1053

3
1151

4
1048

Q:

A) Rs. 300 | B) Rs. 315 |

C) Rs. 326 | D) Rs. 175 |

6
869