A boy measured the length and breadth 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

**E. 0.1%**

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

=

100/1

= 0.1%

## Recent Comments