Answer:
The distance cover by teacher in 30 minutes is 4 miles .
Step-by-step explanation:
Given as :
The distance cover by student = d = 3 miles
i.e d = miles
The time taken by student to cover miles distance = t = 30 minutes
Let The speed of student = s miles per minute
∵ Speed =
Or, s =
Or, s =
i.e s = 0.111 miles per min
So, The speed of student = s = 0.111 miles per min
<u>Now, Again</u>
The speed of teacher = 1 times as fast as student
Let The speed of teacher = S miles per min
∵ The speed of teacher = × speed of student
So, S = × s
Or, S = × 0.111 miles per min
Or, S = mil/min
i.e, S = 0.13875 miles per min
So, The speed of teacher = S = 0.13875 miles per min
Let The distance cover by teacher = D miles
The time taken by teacher to cover D miles distance = T = 30 minutes
∵ Distance = Speed × Time
Or, D = S × T
Or, D = 0.13875 miles per min × 30 min
∴ D = 4.1625 miles
i.e D = 4 miles
So, The distance cover by teacher in 30 minutes = D = 4 miles
Hence,The distance cover by teacher in 30 minutes is 4 miles . Answer