Question

two.cars AatwondB which are 280km apart start travelling at the same.time of they traveled in opposite directions,they meet agter 2hours is they travel.in the same direction A meets B after 14hours,what is the speed of car B​

Answer 1

Answer:

60kmph

Step-by-step explanation:

Speed of car A=u kmph

Speed of car B =v kmph

then we can make two equations ,

2*u+2*v=280----------(1) (s*t=d) (+ since they are moving in opp direction)

14*u-14*v=280---------(2) (s*t=d) (- since they are moving in same direction)

subtracting 1 & 2,we get v=60 kmph i.e, speed of car B

Answer 2

Answer:

speed of car B is 60km/hr

Step-by-step explanation:

A<------------------------------>B are 280 km

when A and B move in opposite direction thus by relative speed concept

Speed in opposite direction = A+B

Speed in same direction = A-B

Since both A and B start at the same time thus;

speed=distance÷time

A+B=280/2         =  140 km/hr

A-B=280/14         =  20 km/hr

by equating above two equations A=80 km/hr and B=60 km/hr