Answer:
1,215 Superscript one-fifth x
Step-by-step explanation:
Given:
The expression to simplify is given as:
We know that,
Here,
So,
So, the above expression becomes:
Now, using the law of indices
Here,
So, the expression is finally simplified to;
Therefore, the second option is the correct one.
= 1,215 Superscript one-fifth x
Answer: The correct option is B, i.e., 40 miles per hour.
Explanation:
Let the speed of bus in the afternoon route be x.
From the given information the average speed is 12 miles per hour less than the afternoon route. So, the speed of bus in the morning route is x-12.
So,
Time taken by bus in morning route is,
Time taken by bus in afternoon route is,
Since it is given that the time is same, so
Since x represents the speed of bus in afternoon route, therefore the correct option is B, i.e., 40 miles per hour.