12. A fast train covers 320 km in 3 hrs and 20 minutes. How much time will it take to cover
distance of 90 km ?
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Step-by-step explanation:
Distance covered by the train = 320 km
Time taken = 3hr 20min = 10/3 hr
We have, Speed = Distance / Time
\text{Speed of the train }= \frac{320}{\frac{10}{3}}= \frac{320\times3}{10}= 96km/hr
Time taken by the tain to cover 90 km = Distance/ Speed = 90/ 96 = 0.9375 hr= 0.9375 ×60 min
= 56min 25 sec
this is the correct
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