The mass of an armored tank is 6×104 kg and of an armored car is 4×103 kg. What is the combined weight of both the vehicles?
64000
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Solution
The correct option is A 64000 Combined weight=((6×104)+(4×103)) kg But, (6×104)+(4×103)=(6×103+1)+(4×103)=(6×101×103)+(4×103)(∵am×an=am+n)=(60×103)+(4×103)=64×103=6.4×10×103=6.4×104 Thus, the combined weight of the tank and the car is 6.4×104 kg = 64000