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RRB Group D Model Paper 10 with solutions
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© examsnet.com
Question : 8
Total: 100
The length of a rectangle is increased by 10% and its breath is decreased by 10%. The area of the new rectangle is
neither increased nor decreased.
increased by 1%.
decreased by 2%.
decreased by 1 %
Validate
Solution:
(4) The decrease or increase in the area can be found by successive percentage rule, i.e. a + b +
a
b
100
.
Increase or decrease in area of the new rectangle
10 - 10 +
−
10
×
10
100
= - 1%
Thus, the area will decrease by 1%.
© examsnet.com
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