Question

when I go to my farmhouse i drive nonstop my car with the speed of 80km/hr but when I travel with my family i take rest and I reach my location with the speed of 60Km/hr Please tell me the stoppage per hour (A) 10 min (B) 12 min (C) 15 min (D) 20 min​

Answer 1

Answer:

Option d

Step-by-step explanation:

Let us take a distance x and t1 be the time when he go alone and t2 be the time required to go with his family

As t2=t1+y.... i

Where y is the time taken for rest

Note: we can write t2 as eqn i because we assume that he drive his car with the same speed all through his different journey either alone or along with his family

Now

80=x/t1...ii

60=x/t2...... iii

From i ii and iii

We get y=1/3

So the y =20 min