Walking three-fourth of his normal speed, Rafi is 16 minutes late in reaching his office. The usual time taken by him to cover the distance between his home and office.
বিকল্পসমূহ (নিজের উত্তর যাচাই করতে ক্লিক করুন):
সঠিক উত্তর
ক (48 min)
বিস্তারিত ব্যাখ্যা ও বিশ্লেষণ:
সমাধান:
Let,
The usual speed be S.
New speed = S × (3/4)
⇒ The ratio of usual speed to new speed = 4 : 3
∴ The ratio of the usual time to new time = 3 : 4
Let,
His usual time be 3x and the new time is 4x.
Difference in time = 4x - 3x = 16 mins
⇒ x = 16 mins T
he usual time taken = 3x
= 3 × 16 = 48 mins
∴ The usual time to reach the office is 48 mins.
