Question

4. A gardener wants to fence a circular garden of diameter 21m. Find the length of the rope he needs to purchase, if he makes 2 rounds of fence. Also find the cost of the
rope,ifitcosts`4permeter.(Takeπ= 22) 7
5. From a circular sheet of radius 4 cm, a circle of radius 3 cm is removed. Find the area of the remaining sheet. (Take π = 3.14)
6. Saima wants to put a lace on the edge of a circular table cover of diameter 1.5 m. Find the length of the lace required and also find its cost if one meter of the lace costs
` 15. (Take π = 3.14)
7. Find the perimeter of the adjoining figure, which is a semicircle including
its diameter.
8. Find the cost of polishing a circular table-top of diameter 1.6 m, if
the rate of polishing is ` 15/m2. (Take π = 3.14)
9. Shazli took a wire of length 44 cm and bent it into the shape of a circle.
Find the radius of that circle. Also find its area. If the same wire is bent into the shape of a square, what will be the length of each of its sides? Which figure encloses more
area,thecircleorthesquare?(Takeπ= 22) 7
10. From a circular card sheet of radius 14 cm, two circles of radius 3.5 cm and a rectangle of length 3 cm and breadth 1cm are removed. (as shown in the adjoining
figure).Findtheareaoftheremainingsheet.(Takeπ= 22

Answer 1

Answer:

528 rs for rope and length of rope needed for two rounds is 132m^2

Step-by-step explanation:

Step 1

d=21m

r=21/2m

circumference of cirlce is 2πr

by substituting the value given i.e radius in the formula and taking π as 22/7 after solving we get

for one round 66m^2

for two rounds =66+66=132m^2

Step 2

cost for 1 meter of rope is 4rs

cost for 132m of rope is 132×4=528

Hence the length of rope needed for two rounds is 132m^2 and the cost for the rope is 528rs.

Answer 2

Quiet long you should try to separate each and into different questions else you won't get any answers this is too long