Math, asked by sparsh79, 11 months ago

ram prakash walks around a circular park of area 88704 m^2 .how long will he take to walk 10 rounds at the speed of 4.5km/hr​

Answers

Answered by Anonymous
23

Step-by-step explanation:

Area of circle = 88704 m²

Radius = ?

Area of circle = πr² = 88704 m²

 \frac{22}{7}  \times  {r}^{2}  = 88704 \\  \\  {r}^{2}  = 88704 \times  \frac{7}{22}  \\  \\ r =  \sqrt{28224}  = 168

Radius of park = 168 cm

So, circumference of park = 2πr

2 \times  \frac{22}{7}  \times 168 = 1056 \: m

Circumference of park = 1056 m

He walka 10 rounds around park so multiple it by 10

1056 x 10 = 10560 m

This area is in metre so change it in kilometre

 \frac{10560}{1000}  = 10.56 \: km

distance travelled by ram = 10.56 km

Speed of ram = 4.5 km/hr

Time taken = ?

time \:  =   \frac{distance}{speed}  \\  \\ time =  \frac{10.56}{4.5}  = 2.34 \: hr \:

He takes 2.34 hr to complete his walk

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