Question

A car travels 195 km 3hours. How long will it take to travel 520 km

Answer 1

time taken for 195km=3hrs
time taken for 1km=3/195hr

time taken for travelling 520km=3*520/195
=8hrs

Answer 2

If the car travels 195 in 3 hours

Then

Let x be the time taken to travel 520km

Km-----hours

195----3

520----x

Cross multiplication

195x=520×3

x=1560

x=1560/195

x=8

8 hours is taken to travel 520kms

ii)

Let the distance travelled of car in 7 hours is y

Km-----hours

195-----3

y--------7

Cross multiplication

3y=195×7

3y=1365

y=1365/3

y=455

So the car travelled 455kms in 7 hours