A car travels at the rate of 80 km per hour and covers 400 km in 5 hours. If he reduces his speed by 10 km per hour, how long will he take to cover the same distance?
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Answer:
40/7 hours
Step-by-step explanation:
speed x time = distance
now speed is 70km/hr
70 x time = 400km
time = 40/7
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