A boy runs 20 km in 2.5 hours. How long will he take to run 32 km at double the previous speed?
Q. A boy runs 20 km in 2.5 hours. How long will he take to run 32 km at double the previous speed?
Answer: 2 hours
Notes: The boy covers 20 km in 2.5 hours. $latex => speed = \frac{20}{2.5} = 8 km/hr.&s=1$ New speed = 16 km/hr ∴ Time $latex = \frac{32}{16} = 2 hours.&s=1$ Hence option [C] is the right answer.