Maths-
General
Easy
Question
A circle has a diameter of 120 metres. Your average walking speed is 4 kilometres per hour. How many minutes will it take you to walk around the boundary of the circle 3 times? Round your answer to the nearest integer.
Hint:
Given , the diameter of circle .Now find the perimeter of circle by using circumference of circle where d is the diameter of a circle.
Now find total distance and speed is given .so, find time taken by using formula.
The correct answer is: time = 0.1885 60 mins = 11.3097 mins (11 is the nearest integer)
ANS :- Time taken to walk 3 times around the circle is 11 mins (approx.)
Explanation :-
Given , the diameter of the circle is 120 m .The no. of round need to cover = 3
Given , the speed = 4 km / hr
circumference of circle
The total distance = no. of rounds × circumference of circle
The total distance
We get
hrs = 0.1885 hrs
As we know 1 hour = 60 mins
As time = 0.1885 × 60 mins = 11.3097 mins (11 is the nearest integer)
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