Question

Travelling at 3/4 of usual speed a person is 10 min late.Find the usual time to cover the distance?

Answer 1

1/2hour or 30minutes
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Answer 2

Distance = Speed x Time

d = 3/4s (t+10)

d = 3/4 st + 30/4 s

d = 3/4d + 30/4s

d - 3/4d = 30/4s

d/4 = 30/4 s

d = 30 s

s x t = 30s

t = 30

The usual time to cover the distance is 30 minutes.