Question

13. Mitesh drives his car at a speed of 70 km per hour. How much distance will he cover in 5 hours 45 minutes?

4. The speed of a train is 60 km per hour. Calculate its speed in metres per second.

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Answer 1

Answer:

1hour=60 minutes

60 min= 70km

1min= 70/60km

then 5hrs45 min=300min+45min

345min=70/60×345

345min= 402 ×3/6 km

Explanation:

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Answer 2

Answer:

(13) 402.5 km

(4) 216 m/s

Explanation:

(13)

Speed of Mitesh Car = 70 km/h

Time taken by Mitesh = 5 hr 45 min

Therefore 45 min in hr = 45/60 hr

Total time = 5+ 45/60 hr

Distance Covered by him = Speed × Time

= 70 × ( 5+ 45/60)

= 70 × 345/60

= 402.5 km Ans

(4)

Speed of train = 60 km/h

Speed in m/s = Speed in km/h × 18/5

= 60 × 18/5

= 216 m/s