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Carl

The distance between two places is 120 km . Acar travelling at a certain speed can covers the distance in 2hours 30 minute. By how many km/h should the speed of the car be increased for it to take 30 minutes less to cover the distance?‚Äč

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Answer:

Examples of nuisance of thermalexpansion : 1 ) Due to high temperature in hot summer , the railway rails may expand and change thier shape to irregular shape . Thismay cause derailment of trains which travel on the track . ... 2 ) Due to high temperature in hot summer , cement floors or walls may give cracks .

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Lawrence
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