Unformatted text preview: Chapter 1r Problem 1EA m (4 Bookmarks} Show all steps: C“ A. 1 A
The area of a rectangle 4.5 cm by 3.25 cm is conectltr gitren by (a)14.525 cnt2, (b) 14.63 CM2; {c} 14.6 cm2; (d) 15 cm2 Stepbystep solution steptet2 A The area Of rectangle is, A = it:
Here. {is the length and b is the breadth. Substitute 45 miter ,land 3'25 cmfor b in A = it:
A =ib ={4.5 om][3.25 om) =14Jﬁ25 cm: Step20f2 A Signiﬁcant digits are the number {if reliable digits in a number. The number Di digits in the ﬁnal
answer should be equal to the smallest number Df digits given in the question. If the digit aﬁer decimal point is greater than 5, then 1 is added to the ﬁnal answer.
The length of rectangle is 45 cm This is the least number of signiﬁcant digits in the question.
So, the ﬁnal answer has onlyr two signiﬁcant ﬁgures. SD, round OiT t0 tWD Signiﬁcant ﬁgures. the area of rectangle is 15 cm: Thus, the correct answer is (d) . ...
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 Summer '14
 Physics, Height, Numerical digit, Decimal, International System of Units, number Df digits

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