Seema travels a distance 800 km. first 35% distance covers at a speed of 40 km / hr, next 40% distance covers 25 km / hr, and remaining distance cover with 30 km / hr. find average speed to cover the whole distance.?

30.22
48.51
40.25
35.12
14.45

LohaHridoy

5 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 1 : 30.22

Distance cover with speed of 40 km / hr = 800 × 0.35 = 280 km

Distance cover with speed of 25 km / hr = 800 × 0.40 = 320 km

Distance cover with speed of 30 km / hr = 800 × 0.25 = 200 km

∵ Time to cover whole distance = 280 / 40 + 320 / 25 + 200 / 30 = 26.47 hr

∴ Average speed = average distance / average time

= (280 + 320 + 200) / 26.47 = 800 / 26.47 = 30.22

5 views Answered 2022-09-04 04:29

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