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1.能,如138×42=5 796,198×27=5 346等.2.不能达到.要达到平均速度为40 km/h,他要用(10)/(40)=0.25(h),但实际上他从A地到B
1. Energy, such as 138×42=5 796, 198×27=5 346, etc. 2. Cannot be reached. To achieve an average speed of 40 km/h, he uses (10)/(40)=0.25(h) but In fact he is from A to B