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By walking 5/3 of usual of speed a student reaches school 20 minutes earlier. Find his usual time.

(1) 45 Minutes (2) 50 Minutes (3) 60 Minutes (4) None of these

March 10, 2024

Solution:

5/3 of usual 3/5 of usual time as he reaches earlier.

= 3/5 usual time + 20 Minutes= Usual time

20 minutes = (1-3/5) usual time

= 2/5 usual time

Usual time = 20*5/2= 50 Minutes

Then answer is 50 minutes.