A boy measured the length and breath of a rectangular lawn as 59.6m and 40.3m respectively instead of 60m and 40m. What is the percentage error in his calculation of the perimeter of the lawn?
-
A.
10% -
B.
1.4% -
C.
7% -
D.
0.2% -
E.
0.1%
Correct Answer: Option E
Explanation
Length = 59.6m
Breath = 40.3m
Perimeter = (59.6m + 40.3m) x 2
= 99.9 x 2 = 199.8m
Actual measurement
Perimeter = (60 + 40) x 2 = 100 x 2 = 200m
Error = 200m – 199.8m = 0.2
Error =0.2/200 x 100/1
= 0.1%