Question

Nagma runs around a rectangular park 180 metre long and 120 metre wide at the rate of 7.5 km per hour in how much time will she complete five rounds

Answer 1

Step-by-step explanation:

we require to find the perimeter of rectangular park

length of rectangular park = 180 m

breadth of rectangular park = 120 m

perimeter of rectangular park = 2(l + b)

= 2(180 + 120)

= 2 × 300

= 600 m

nagma covers 600 m in one round

she completes 5 rounds

total distance covered = 5 × 600 = 3000 m

speed of nagma is 7.5 km/h or 7500 m per hr

time taken to cover distance of 3000 m

7500 m in 60 mins

3000 m in x mins

$7500 \times x = 3000 \times 60 \\ x = \frac{3000 \times 60}{7500} \\ x = \frac{1800}{75} \\ x = 24$

time taken to run 5 rounds is 24 mins

hope you get your answer