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Question

34×48 is equal to

A
712
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B
1232
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C
21232
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D
2712
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Solution

The correct option is D 21232
IrrationalMultiplication:34×48=34×44×2=34×44×42=413+14×42=4712×424712×42=(22)712×42=(2)76×214=(2)76+14=21712=12217=12212×25=2.1232Note:Resultofirrationalmultiplicationmayormaynotbeirrational.Inthiscaseitisirrational.Butconsider:5×5=5×5=512+12=51=5(Notirrational)

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