Question

The area of a circular playground is 22176 cm2. Find the cost of fencing this ground at the rate of Rs 50 per metreNCERT Class

Answer 1

Answer:

Area of a circular playground=Pie×rsquare

22176 cmsquare=22/7×rsquare

22176×7/22=rsquare

7056=rsquare

r(radius) =84cm

For fencing we need to find circumference of circular playground=2×Pie×r

=2×22/7×84

=528cm

Rate of fencing=Rs. 50 per m

528cm=5.28m

Cost of fencing=50×5.28

=Rs.264

Answer 2

Step-by-step explanation:

area of a circular

play ground=pie×rsquare

22176cm square=22/7×rsquare

22176×7/22=rsquare

7056=rsquare

r(radius)=84cm

for fencing we need to find circumference of circle

play ground=2×pie×r

=2×22/7×84

= 528cm

rate of fencing = rs 50 per m

528cm=5.28m

cost of fencing = 50×5.28

= Rs. 264