Math problem: How many kilometers is there between things? (Solve by two arithmetic methods) - Training Enrollment Network

Math problem: How many kilometers is there between things? (Solve by two arithmetic methods)

The first method (3-1) ÷ (1/7-1/8)

=2÷ 1/56

=112km

The second method, the distance is equal: let a speed x kilometers per hour and b speed y kilometers per hour.

8(x+y)=7﹙x- 1+y+3﹚

x+y= 14

14× 8 =112km

The distance from AB to Beijing is 1 12km.

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