9. A car does a journey in 10 h, the first half at 21 km per hour, and the rest at 24 km per hour. The distance travelled by the car is (a) 264 km (b) 244 km (c) 254 km (d) 224 km
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Step-by-step explanation:
speed in first half = 21 km/h
time taken = 5hours
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