Question

A man starts from a stations S, by car and wants to reach another station S2. If he
drives his car at speed of 51 km/h, then he reaches Szin 4 hours. How much
should he increase the speed of his car so that he can reach the station S, in 3
hours.​

Answer 1

Answer:

68

Step-by-step explanation:

he drives from station 1 to station 2 in 4 hours at a speed of 51 km/ph,

so, d= s×t

so d=51×4=204km

so speed required to cover distance in 3 hours

= d/t= 204/3=68 km

speed= 68 km

hope it helps