Subtract $778 m 78 c m$ from $2 k m 768 c m$

1228.9 m

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571.1 m

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1221.988 m

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189.22 m

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Solution

The correct option is A $1228.9 m$
First we have to convert both the quantities in $m$
$1 m = 100 c m$
$\Rightarrow 1 c m = .01 m$
$778 m 78 c m = 778 + .01 \times 78 = 778.78 m$
$1 k m = 1000 m$
$2 k m 768 c m = 2 \times 1000 + .01 \times 768 = 2007.68 m$
Now subtracting both
$2007.86 - 778.8 = 1128.9 m$
Option $A$ is correct.

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