Question

The area of a rectangular field is 3584m2 and its length is 64m.A boy runs around the field at the rate of 6km/h.How long will he take to go 5 times around it?

Answer 1

Answer:

Area of the rectangular field = 3584 M2.

Length of the rectangular field = 64 Mtrs.

Area of rectangle = Length x Breadth

So 64 x Breadth = 3584

Breadth = 3584/64 = 56 Mtrs.

Total distance to be ran by the boy = 5 x Perimeter of the rectangula Field

= 5 x 2(Length + Breadth) = 5 x 2(64 + 56) = 10 x 120 = 1200 Mtrs.= 1.2 Kms.

Speed of the boy = 6 Kms/Hr

So the time the boy will take = 1.2/6 = 0.2 Hrs x 60 = 12 Mins.

Ans: 12 Mins.

Answer 2

Hey

Area of rectangle = 3584 m²
Length = 64 m
So ,
$bredth = \frac{area}{length}$

$= > b = \frac{3584}{64}$

$= > b = 56$
So , breadth = 56 m .

Now , perimeter = 2 ( l + b )
= 2 ( 64 + 56 )
= 2 * 120
= 240 m .

Total distance made in 5 rounds = 5 * 240
= 1200 m = 1 km 200 m = 1.2 km

Now , speed = 6km / hour

$time = \frac{ditance}{speed}$

$= > time = \frac{1.2}{6}$

$= > time = 0.2$

time = 0.2 × 60 min

time = 12 min

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