Question

Given is a table for the start and finish times of $4$ spaceships in a competition. Find out the time taken by all the spaceships and select the correct option for the ascending order of time taken by them.

• A.
  $\text{Moontrooper}<\text{Falconer}<\text{X-plorer}<\text{Vector}$
• B. $\text{Vector}<\text{X-plorer}<\text{Falconer}<\text{Moontrooper}$
• C. $\text{Vector}<\text{Falconer}<\text{X-plorer}<\text{Moontrooper}$

Answer 1

The correct option is B $\text{Vector}<\text{X-plorer}<\text{Falconer}<\text{Moontrooper}$

Time taken by each space ship $=$ Finish time - Start time

We will find out the time taken for each space ship one by one.

For Moontrooper:


Thus the time taken by Moontrooper is $2$ h $3$ min $11$ sec.

For Vector:


We need to borrow from hours column.
$\because 1$ hour $=60$ minutes.
So,


Thus the time taken by Vector is $1$ h $36$ min $17$ s.

For Falconer:


We need to borrow from minutes column.
$\because 1$ minute $=60$ seconds.
So,


Thus Falconer takes $2$ h $01$ min $49$ s.

And finally for X-plorer:


Here, we need to borrow from both hour and minute, $1$ hour is $60$ minutes and $1$ minute is $60$ seconds. So,


Which means the X-plorer take $1$ h $43$ min $35$ s.

So the ascending order of the time taken by the spaceships will be:

$\text{Vector}<\text{X-plorer}<\text{Falconer}<\text{Moontrooper}$

So, option (b) is correct.