Question

.
A can covers a distance of 240km with same
speed. If the speed is increased by 20 km/hr
it will cover the some distance in 2hr
less. find the usual speed of the car

step by step explanation

​

Answer 1

Answer:

Speed = 30km/hr

Step-by-step explanation:

Lets assume speed =20 and time = t

So distance = speed x time ,

240 =20t, first condition.

Now speed is increased by 20 eg +20

and time reqd. is 2hr less.

So 240 = (20+20)(t-2),

240 = 40t-80,

t= 8,

So initial speed will be 240÷8,

Speed = 30km/hr

After solving this it will give u d time t=8,