Math, asked by tseringyangchan999, 7 months ago

7. A person drives a car with a speed of 60 km/hr and reaches his destination in 4 hours. If he decides to reach in 3 hours, what should be the speed?​

Answers

Answered by altafkhan6309
7

Solution :- It is simple as we know the relation between velocity,time,and distance

Velocity=distance/time

At first given 60km/hr speed with a time of 4hrs.now find the distance

Distance=velocity×time

D=v×t=60km/hr×4hr=240km(distance)

Velocity is unknown now.

To find velocity

Velocity =distance/time

V=d/t=240km/3hr=80km/hr

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Distance = Speed x time

60 x 4 = v x 3

V= 80

Yea so it’s gonna be 80km/h

A takes 3 hours more than B, who drives his car 5 kmph faster than A, to cover a distance of 180 km. what is the speed of A?

A man drives a car and reaches his destination in 4 hours. Had he increased his speed by 10 km/hr, he would have reached it in 3 hr, 12 minutes. What distance did the man cover?

A bus traveling at 42 km per hour covers a distance in 5 hour. How much time would it save if it increased its speed by 8 km per hour?

The answer is 80km/hr

Distance = speed × time

D=60 ×4

D=240

In 3 hrs

240=vt

240=3v

V=240÷3

V=80km/hr

At first should be finding a distance which covered by car till destination than reverse process for find a speed for that particular distance

Useing ( speed = distance / time).

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The Original Speed is 60 km/h, Time = 4 hours, Distance is 240 km.

Distance is 240 km, Revised Time = 3 hours, Revised Speed = 80 km/h

As speed =distance /time

Distance = speed × time

As distance remains same in both cases..

60 ×4 = v × 3

v = 80 km / hr

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