Discussions
Select Date
Tags:
Muskan Tanwar

· started a discussion

· 1 Months ago

sollution

Question:
On walking at 1 \(\cfrac{1}{2}\) times of his original speed, a person reaches his office 40 minutes early. If his original speed is 10 km/hour, then what is the distance between his home and office ?
Options:
A) 10 km
B) 15 km
C) 20 km
D) 25 km
Solution:
Ans: (c) Original speed = 10 km/hr

Increased speed = 10 × \(\cfrac{3}{2}\) = 15 km/hr


1 hours = 60 minutes 

If he reaches 60 minutes earlier then distance = 30 km

If he reaches 40 minutes earlier then distance = \(\cfrac{30}{60}\) × 40 = 20 km

All Rights Reserved Top Rankers