Question

how long will a boy take take to go three round the feild ‚ if he walks at a rate of 1.5 m per second
length is 80m breadth is 35m
​

Answer 1

Answer:

Step-by-step explanation:

First the perimeter of the field 2(l + b); that's

$2 \times (80 + 35) = 230$

Then as the speed is 1.5m/s

$230 \div 1.5 = 153 .33333$

that's in minute

$153.333 \div 60 = 2.555$

Answer 2

✯ Given:-

• Length of rectangular field = 80m

• Breadth of rectangular field = 35m

• Rate of boy of walking = 1.5 m per second

✯ To Find:-

• Time taken by boy to cover three rounds of the field

✯ Formula Used:-

• Perimeter of rectangle = 2 ( length + breadth )

• Time = Distance ÷ Speed

✯ Solution:-

✧ Finding perimeter of field:-

Perimeter of field

= perimeter of rectangle

= 2 ( length + breadth )

= 2 ( 80m + 35m )

= 2 × 115

= 230 m

∴ Perimeter of rectangular field is 230m

✧ Finding distance to be covered by boy:-

Distance covered by boy

= 3 times of field

= 3 × 230

= 690 m

∴ Distance covered by boy is 690 m

✧ Finding time taken by boy:-

Time

= Distance ÷ Time

= 690 ÷ 1.5

= 138seconds

Time taken by boy

= 138 second

= 120 + 18

= 2 minites 18 seconds

✯ Answer:-

Time taken by boy to cover 3 times of field is 2 minutes 18 seconds.

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