13. A motor car travels 3½ hours at an average speed of 25 km per hour. How long would it take to cover the same distance at a speed of 42 km per hour?
i want step by step explanation
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Answer:
Given,
Speed=25
Time=3½
Distance=Speed×Time
=25×3½
=85.5
therefore,
the time to cover the same distance at the speed of 42 km per hour is,
Distance=85.5
Speed=42
Time=Distance÷Speed
=85.5÷42
=2.35
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