Question

One park is 1500 meters long and 750 meters the bell a cyclist has to make this park four rounds 4.5 km for hour How long does it take him to speed up​

Answer 1

The time is "4 hours".

Step-by-step explanation:

Given,

The length of park(l) = 1500 metres, the breadth of park(b) = 750 metres and speed = 4.5  $\dfrac{km}{hr}$

To find, the time(t) = ?

We know that,

The perimeter of rectangle = 2(l + b)

∴ The perimeter of rectangular park =2(1500 + 750) m

= 4500 m

The total distance of four round of the park = 4 × 4500 m

= 18000 m = 18 km

∴ Speed = $\dfrac{Distance}{Time(t)}$

⇒ Time(t)= $\dfrac{Distance}{Speed}$

$=\dfrac{18}{4.5}=\dfrac{180}{45} =4hr$

Hence, the time is "4 hours".