A takes 2 hours more than B to cover a distance of 40 km. If A doubles his speed, he takes \(1\frac{1}{2}\) 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?

A takes 2 hours more than B to cover a distance of 40 km. If A doubles

1.	A takes 2 hours more than B to cover a distance of 40 km. If A doubles his speed, he takes \(1\frac{1}{2}\) 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?
A.	\(1 \frac{1}{3}\) hours
B.	\(1 \frac{3}{8}\)hours
C.	\(1 \frac{1}{8}\)hours
D.	\(1 \frac{1}{6}\) hours
Answer» D. \(1 \frac{1}{6}\) hours

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A takes 2 hours more than B to cover a distance of 40 km. If A doubles his speed, he takes \(1\frac{1}{2}\) 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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