Question
If Afnan drives at 4/5th of his usual speed to his office, he is 6 minutes late. What is his usual time to reach his office?
Answer: Option B
LET T BE HIS USUAL TIME TO REACH HIS OFFICE AND V BE HIS USUAL SPEED.
V = D/T ……….(D IS THE DISTANCE AFNAN TRAVELS WHILE GOING TO HIS OFFICE)
VT = D
AT V1 = 4V/5 ; T1 = T + 6
4V/5 = D/(T + 6)
4V/5* (T + 6) = D
4V/5* (T + 6) = VT
ON SOLVING WE GET,
T = 24 MINUTES
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LET T BE HIS USUAL TIME TO REACH HIS OFFICE AND V BE HIS USUAL SPEED.
V = D/T ……….(D IS THE DISTANCE AFNAN TRAVELS WHILE GOING TO HIS OFFICE)
VT = D
AT V1 = 4V/5 ; T1 = T + 6
4V/5 = D/(T + 6)
4V/5* (T + 6) = D
4V/5* (T + 6) = VT
ON SOLVING WE GET,
T = 24 MINUTES
Was this answer helpful ?
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