Question

(11) cost of cementing the floor of the verandah at the rate of 15 per m².
7. A path 5 m wide runs along inside a rectangular field. The length of the rectangular field is three times
the breadth of the field. If the area of the path is 500 m², then find the length and breadth of the field.
8. If it costs 1600 to fence a rectangular park of length 20 m at the rate of 25 per m, find the breadth of
the park and its perimeter. Also, find the area of the park.​

Answer 1

Answer:

ANSWER

Given inner side of square park, s=100 cm

Area of inner square =100

2

=10000 cm

2

width of path,w=5 cm

Outer side of square =100+5+5=110 cm

Area of outer square =110

2

=12100 cm

2

Area of path =12100−10000=2100 cm

2

Cost of cementing at the rate of Rs 250 per 10 sq cm = Rs 250×210= Rs 52500

∴ Cost of cementing a 2100 cm

2

path =Rs. 52500