Question

solve this sum for my exam

Answer 1

Answer:

Step-by-step explanation:

Answer 2

inner circumference = 220m
$c = 2\pi \: r \\ 220 = 2 \times \frac{22}{7} \times r \\ \frac{220 \times 7}{22 \times 2} = r \\ r = 35$
radius of inner circle is 35 m.
the track is 7m wide.
radius of outer circle = 35 + 7 = 42m
circumference of outer circle
$c = 2\pi \: r \\ c = 2 \times \frac{22}{7} \times 42 \\ c = 264$
circumference of outer circle is 264 m.
total cost for fencing = 264 × 2
= 528 rupees