Cost of polishing a circular table top of radius 2 m, if the rate of
polishing is 10 per m2 is
[Take n = 3.14]
a) 125.6
b) 12.56
c) 20
d) 10
Answers
Answer:
(a) 125.6
Step-by-step explanation:
First of all you have to just look for what it's asking about its about the whole inner area of the circle so here the formula to be used will be πr²
so provided radius = 2m
rate of polishing= Rs10/m²
so,. putting the value in formula we get,
πr²=3.14×2×2= 12.56
no the total amount= 12.56×10=125.6
Answer:
Option a is the answer for the given problem
Step-by-step explanation:
Given:-
Cost of polishing a circular table top of radius 2 m, if the rate of polishing is 10 per m2 is
is 10 per m2 is[Take n = 3.14].
To find:-
Cost of polishing the table.
Solution:-
Radius of the circular table =(r)=2m
Using formula:-
If the radius of the circle is 'r' units then the area of the circle is πr² sq.units
=>Area=π×(2)² m²
=>Area=3.14×4 m²
=>Area=12.56m2
Area of the circular table=12.56m²
Cost of polishing of 1 m²=Rs. 10
Cost of polishing for 12.56 m²=12.56×10=Rs. 125.6