A pedestrian crosswalk consists of black and white strips each 0.4m wide. The crosswalk begins and ends with a white strip, and there are 8 white strips in all. How wide is the crosswalk?
The ages of two friends on Ani and Biju differ by 3 years a nice father is twice as old as b and b is twice as old as his sister Cathy the ages of Cathy and the market for by 30 years find the ages of Ani and Biju
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