A takes 2 hours more than B to cover a distance of 40 km. If A doubles his speed, he takes 112hours 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?

Distance same Speed = 1 : 2 Time = 2 : 1 1 unit → 2.5 2 unit → 2 × 2.5 = 5 hr A = 5 hr B = 1 hr Speed of B = = 801 = 80 km/hr Time = 9080 = 118hr

This question belongs to Arithmetic Ability Speed Time And Distance

Speed Time and Distance

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) $$1\frac{3}{8}{\text{hours}}$$ B) $$1\frac{1}{8}{\text{hours}}$$ C) $$1\frac{1}{6}{\text{hours}}$$ D) $$1\frac{1}{3}{\text{hours}}$$

Answer & Solution

Correct Answer: Option B

Speed Time and Distance mcq question image

Distance same
Speed = 1 : 2
Time = 2 : 1
1 unit → 2.5
2 unit → 2 × 2.5 = 5 hr
A = 5 hr
B = 1 hr
Speed of B = $$ = \frac{{80}}{1}$$ = 80 km/hr
Time $$ = \frac{{90}}{{80}} = 1\frac{1}{8}{\text{hr}}$$

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A takes 2 hours more than B to cover a distance...

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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