A takes 2 hours more than B to cover a distance of 40 km. If A doubles his speed, he takes $$1{1\over 2} $$ hours more than B to cover 80 km. To cover a distance of 90 km, how much time will B take travelling at his same speed?
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Q:
A takes 2 hours more than B to cover a distance of 40 km. If A doubles his speed, he takes $$1{1\over 2} $$ hours more than B to cover 80 km. To cover a distance of 90 km, how much time will B take travelling at his same speed?
- 1$$1{3\over 8}$$ hoursfalse
- 2$$1{1\over 8}$$ hourstrue
- 3$$1{1\over 6}$$ hoursfalse
- 4$$1{1\over 3}$$ hoursfalse
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