A rectangular hall is measured 290 m by 210 m How long will it take for a boy to take two rounds around the whole if he walks at the rate of 2.5 m / second ?
To find the time it takes for the boy to take two rounds around the rectangular hall, we need to calculate the total distance he needs to cover and then divide it by his walking speed.
The perimeter of a rectangle is given by the formula: P = 2(length + width)
Given that the length of the hall is 290 m and the width is 210 m, we can calculate the perimeter:
P = 2(290 + 210) = 2(500) = 1000 m
Since the boy needs to take two rounds around the hall, the total distance he needs to cover is:
Total distance = 2 * P = 2 * 1000 = 2000 m
Now, we can calculate the time it takes for the boy to cover this distance at a speed of 2.5 m/second:
Time = Distance / Speed = 2000 m / 2.5 m/second
Time = 800 seconds
Therefore, it will take the boy 800 seconds to take two rounds around the rectangular hall.
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Verified answer
To find the time it takes for the boy to take two rounds around the rectangular hall, we need to calculate the total distance he needs to cover and then divide it by his walking speed.
The perimeter of a rectangle is given by the formula: P = 2(length + width)
Given that the length of the hall is 290 m and the width is 210 m, we can calculate the perimeter:
P = 2(290 + 210) = 2(500) = 1000 m
Since the boy needs to take two rounds around the hall, the total distance he needs to cover is:
Total distance = 2 * P = 2 * 1000 = 2000 m
Now, we can calculate the time it takes for the boy to cover this distance at a speed of 2.5 m/second:
Time = Distance / Speed = 2000 m / 2.5 m/second
Time = 800 seconds
Therefore, it will take the boy 800 seconds to take two rounds around the rectangular hall.