Question

13. Due to bad condition of road normal speed of car is reduced by 20 km/hr and it take 48 minutes more to cover 320 km. What time it takes to cover same distance with his normal speed? 1. 4.2 hour 2. 2.8 hour 3.3.2 hour 4. 3.5 hour 5.3.6 hour Directior "0): Calculate the approximate value of (?) in the given questions,​

Answer 1

Answer:

Option no 3 is the correct answer 3.2 hour

Explanation:

Let original time be 't'.

And normal speed be 'x' km/hr.

Normally it takes x × t = 320.

After reduced

(x– 20) × (t+ 48/60) = 320.

After solving this t = 3.2 hours.