Question

A car covers a certain distance in 15 hours at the speed of48 km/h. find the increase in speed if the distance is to be covered in 10 hours.​

Answer 1

Answer:

u=24km/hr

Step-by-step explanation:

let the distance covered be X

speed × time = distance

then 15×48 =x

but not the x is to be covered in 10 hrs so

and let the required speed is u

then

u×10=x

u×10= 15×48

u=72km/hr

so the increase in speed=( final - initial ) speed

so speed= 72-48= 24km/hr

Keep Solving :-)

Answer 2

Step-by-step explanation:

Total distance = 48×15

= 720 Km

let the increase in speed be ' x '

New Speed = (48+x)Km/h

Distance = 720Km

Time = 10 hrs

Speed = Distance / Time

(48+x) = 720/10

48+x = 72

x = 72-48

x = 24

so, speed should be increased by 24 Km/h