Question

8. A rectangular field is 72 m by 58 m. Keya walks around it at the rate of 3 km per hour.
How long will she take to make 3 rounds?
9. Find the cost of fencing a square park of side 17 m at the rate of 327.50 per metre.
10. The cost of fencing a square park at the rate of 7 31.25 per metre is 3 3312.50. Find the
length of each side of the park.
11. Abhijeet takes 2 rounds of a square park of side 125 m and Nayantara takes 3 rounds
rectangular park of length 70 m and breadth 45 m. Who covers more distance and how
12. The sides of a triangular field are 25 m, 20 m and 16 m. Find the total distance cover
a girl in taking 2 rounds of this field.
13. The perimeter of an equilateral triangle is 2 m 55 cm. Find the length of its side.
14. Find the perimeter of an isosceles triangle with equal sides of 16 cm each and the
side equal to 12 cm.
15. Find the perimeter of
1. a regular pentagon of side 3.5 cm
ii. a regular hexagon of side 3.5 cm
iii. a regular octagon of side 3.5 cm iv. a regular decagon of side 3.5 cm
16. Two sides of a triangle are 24.8 cm and 15.6 cm. If the perimeter of the triangle
side.​

Answer 1

Answer:

Length of one round =2(72+58) = 260m

total length of three rounds = 3(260) = 780m  = 0.78 km

Time to make three rounds =  

speed

distance

​  

 

                                              =  

3

0.78

​  

 

                                                15.6min

Explanation: