A takes 2 hours more than B to walk d km, but if A doubles his speed, then he can make it in 1 hour less than B. How much time does B require for walking d km?

A d/2 hours

B 5 hours

C 4 hours

D d/3 hours

Solution

Correct Answer: Option C

মনে করি ,
              d km যেতে B এর সময় লাগে =1 ঘণ্টা
অতএব   "        "      A "      "      "       =t+2 "
এখন ,A এর গতি দ্বিগুণ করলে সময় লাগবে =(t+2)/2 ঘণ্টা
প্রশ্নমতে ,  t-(t+2)/2=1
                (2t-t-2)/2=1
                t-2=2
                t=4 ঘণ্টা 

Practice More Questions on Our App!

Download our app for free and access thousands of MCQ questions with detailed solutions