## coxbazar divisional 2014 Q.no.-1

For students of class 9-10 (age 14-16)
Mahfuz Sobhan
Posts: 25
Joined: Sat Feb 07, 2015 5:40 pm

### coxbazar divisional 2014 Q.no.-1

Avik runs twice as fast as Tusher. Kamrul runs 4 times slower than Tusher. They started running together. After some time if the distance between Kamrul and Avik is 105 meters than find the total of the distances they covered individually.

Tasnood
Posts: 73
Joined: Tue Jan 06, 2015 1:46 pm

### Re: coxbazar divisional 2014 Q.no.-1

It can be solved in the way of Physics!

The velocity of Kamrul $a$ m/s
The velocity of Tusher $4a$ m/s
The velocity of Avik $8a$ m/s

After a limited time $t$, Kamrul, Tusher and Avik passed $at$ m, $4at$ m and $8at$ m respectively.
Then, $8at-at=150$
$7at=105$
$13at=\frac{105*13}{7}$

As the total passed distance=$at+4at+8at=13at$, they passed this distance in total.