IBM Company Numerical Ability Area and Volume

An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is:
A. 2% B. 2.02%
C. 4% D. 4.04%

Read Solution (Total 2)

100 cm is read as 102 cm.

A1 = (100 x 100) cm2 and A2 (102 x 102) cm2.

(A2 - A1) = [(102)2 - (100)2]

= (102 + 100) x (102 - 100)

= 404 cm2.

Percentage error = 404 x 100 % = 4.04%
100 x 100
9 years agoHelpfull: Yes(4) No(1)

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IBM Other Question

If I clean a 3200 square foot building five nights per week for a sum of $575.00 per month, what is the cost per square foot? The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) is:
A. 15360 B. 153600
C. 30720 D. 307200