Question
What should come in place of the question mark (?) in
the following question? 3.5 × 2 .4 × ? = 42Solution
Given: 3.5×2.4×?=42 3.5×2.4=8.4 
How much time a train 200 metres long running at the speed of 72 km/hr take to cross a bridge 180 metres in length?    Â
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