Question

A park is 1500 metres long and 750 metres
wide. A cyclist has to take four rounds of this
park. How much time will he take at the speed
of 4.5 km/h ?​

Answer 1

Answer:

1 hour

Step-by-step explanation:

the perimeter of the field is 2 (1500+750)=4500m ie 4.5km

and y he cyclist's speed is 4.5 km/h

theregore he takes 1 hour

Answer 2

The time taken by 4 hr.

Step-by-step explanation:

Given,

The lenth of park(l) = 1500 metres = 1.5 km and

The width of park(b) = 750 metres = 0.75 km

To find, the how much time will he take at the speed  of 4.5 $\dfrac{km}{h}=?$

We know that,

The perimeter of rectangle $=2(l+b)$

∴ The perimeter of rectangular park $=2(1.5+0.75)$

$=2(2.25)km$

= 4.5 km

A cyclist has to take four rounds of this  park = 4 × 4.5 km = 18 km

Distance = 18 km and speed = 4.5 $\dfrac{km}{hr}$

∴  Time $=\dfrac{Distance}{Speed}$

$=\dfrac{18 km}{4.5\dfrac{km}{hr}}$

= 4 hr

Hence, the time taken by 4 hr.