Question

Convert the hours into minutes and seconds
A. 143 hours
B. 649 hours

Answer 1

Hint: According to the given in the question we have to convert part (A) 143 hours and part (B) 649 hours. So, first of all, we will convert the hours into minutes with the help of the formula as given below:
1 hour = 60min………….….. (1)
Hence, to convert hours to minutes we have to multiply hours by 60.
Now, after converting hours into minutes we have to convert minutes into seconds as asked in the question so, to convert the minutes into seconds we have to use the formula as given below:
1 minute = 60seconds………..….. (2)
Hence, to convert minutes to seconds we have to multiply minutes with 60.

Complete step-by-step solution:
(A)
First of all, we will convert 143 hours into minutes with the help of the formula (1) as mentioned in the solution hint.
$ \Rightarrow 143{\rm{hours}} = \left( {143 \times 60} \right){\rm{min}}$
Multiply the terms on the right side,
$ \Rightarrow 143{\rm{hours}} = 8580{\rm{min}}$
Now, we have to convert the obtained minutes of 143 hours into seconds with the help of the formula (2) as mentioned in the solution hint.
$ \Rightarrow 8580{\rm{min}} = \left( {8580 \times 60} \right){\rm{sec}}$
Multiply the terms on the right side,
$ \Rightarrow 8580{\rm{min}} = 514800{\rm{sec}}$
(B)
First of all, we will convert 649 hours into minutes with the help of the formula (1) as mentioned in the solution hint.
$ \Rightarrow 649{\rm{hours}} = \left( {649 \times 60} \right){\rm{min}}$
Multiply the terms on the right side,
$ \Rightarrow 649{\rm{hours}} = 38940{\rm{min}}$
Now, we have to convert the obtained minutes of 649 hours into seconds with the help of the formula (2) as mentioned in the solution hint.
$ \Rightarrow 38940{\rm{min}} = \left( {38940 \times 60} \right){\rm{sec}}$
Multiply the terms on the right side,
$ \Rightarrow 38940{\rm{min}} = 2336400{\rm{sec}}$

Hence, with the help of formulas (1) and (2), we have obtained or converted 143 hours into 8580 minutes and 514800 seconds and also converted 649 hours into 38940 minutes and 2336400 seconds.

Note: To convert hours into seconds we can also multiply the hours by 3600 as we know there are 60min in 1 hour and 60 seconds in 1 minute.
To convert seconds into minutes we have to divide the given minutes by 60 and to convert minutes into hours we have to divide the given minutes by 60.