Question

The length of a rectangular field is 100 m while its breadth is 75 m. If Sohini wants to jog around the field 5 times in a quarter hour, at what speed (in km/h) should she jog?

Answer 1

Answer:

$\huge\bold\red{\underline{\underline{\mathfrak{Given:}}}}$

Lenght = 100m

Breadth = 75m

Time = 15 mins

= 1/4

$\huge\bold\red{\underline{\underline{\mathfrak{</strong><strong>Solution</strong><strong>:}}}}$

Perimeter = 2(b + l)

= 2(100 + 75)

= 2(175)

= 350m

She jogs 5 time around the ground

= 5(perimeter)

= 5(350)

=1750m

1 m = 1000km

1750m = 1.75km

Speed = Distance × time

= 1.75 × 1/4

$\huge\bold{\boxed{\boxed{Speed\:=\:4.375m/s}}}$