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Step-by-step explanation:
We will convert both the values of mixed fraction into improper fraction..
Which will give
2797/11 for the speed the train had before
6935/22 for the speed it needs to increase till
As the values are in m/hr only, we will subtract the initial speed from the final speed..
Which is
=6935/22 - 2797/11
=1341/22 miles/hour
Which is=60*21/22 miles/hour
Thus the train needs to cover 60*21/22 miles/hour if it increases its speed.
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