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Mathematics 9 Online
OpenStudy (anonymous):

Usain Bolt is fast. Spiderman is 3 times faster than Bolt. Batman is 1.5 times slower than spiderman. Obama is 5 times faster than batman in his car. calculate the speed of Obama in his car. (assuming bolt's speed is 10mph)

OpenStudy (kamille):

Spiderman is 3 times faster than Bolt. 10mph*3=30mph Batman is 1.5 times slower than spiderman 30mph:1.5=20mph Obama is 5 times faster than batman in his car. 20mph*5=100mph

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