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Quantities and Units - Engineering

Q1:

When these numbers are added, (87 × 105) + (2.5 × 106), the result is

A 1.12 × 104

B 11.2 × 105

C 112 × 105

D 1,120 × 106

ANS:C - 112 × 105

Take the common 10^5 i.e
10^5 [(87 x 1) + (2.5 x 10)].
10^5 [(87+25].
10^5 [112].
Answer is 112 x 10^5.