9. A pathway 5 m wide is to be laid along the outside
boundary of a square park 80 m long. If it costs rs 40 per sq. m to pave the path, how much would the
entire job cost?
Answers
Answer:
Total cost of the pave the path =Rs.33000
Step-by-step explanation:
Given:-
A pathway 5 m wide is to be laid along the outside boundary of a square park 80 m long. If it costs rs 40 per sq. m to pave the path.
To find:-
How much would the entire job cost?
Solution:-
Side of the square=80 m
Width of the path is to be laid along the outside of the square park=5m
side of the outer square park=80+5=85m
Area of the inner square=side×side
=>Area=80×80=6400 sq.m
Area of the inner square park=6400 sq.m---(1)
Are of the outer square park=85×85
=>7225 sq.m------(2)
Area of the path =
Area of the outer square park-Area of the inner square park
=>7225-6400
=>825 sq.m
Cost of 1 sq.m to pave the path=Rs.40
Total cost of 825sq.m to pave the path
=>825×40
=>Rs. 33000
Answer:-
Total cost of the pave the path =Rs.33000