Question

2.5% of ________ is 2 minutes 45 seconds.

Answer 1

Answer:

The correct answer is 110 minutes or 1 hour 50 minutes

Step-by-step explanation:

Given 2.5% of _ = 2 minutes 45  seconds

  for our convenient convert 2 minutes  45 seconds in completely seconds  

  1 minute = 60 seconds ⇒ 2 minutes + 45 seconds  

                                     = 2 × 60 +45 seconds

                                     = 120 + 45 = 165 seconds

 let required answer is X,   2.5 % of X = 165 seconds

 which can we written as   $\frac{2.5 }{100}$ (X) = 165   [ 2.5% means $\frac{2.5}{100}$ ]

                                               X= $165$×$\frac{100}{2.5}$

                                               X = 165×40 = 6600 seconds

to convert 6600 seconds into minutes divide it by 60  ( 1 minute = 60 seconds )  

                                               6600÷60 =110 minutes