Question

22. A car takes 30 minutes to travel from town A to town B if it travels at a speed of
50 km/hr. If its speed is increased by 20%, how long will it take to travel from
town A to town B?
(b) 20 min
(d) 15 min
(a) 10 min
(c) 25 min​

Answer 1

Given :

• Speed = v =50km/h
• Time = t = 30min = (1/2) hour
• Speed is increased by 20%

Let :

Distance between TownA & Town B = x

To find :

Time taken to travel from town A to town B with new speed

Formula used :

Distance = speed × time

Solution :

✪ In first case

➠ speed = 50km/h

➠ time = 30 minutes = 0.5 hour

➠ Distance between Town A & town B = speed × time

➝ Distance between Town A & town B = 50 × 0.5

➝ Distance between Town A & town B = 25km

✪ In 2nd case

✪ In 2nd case➠ New Speed = original speed + 20% of original speed

➝ New Speed = 50 + (20×50)/100

➝ New Speed = 50 + 10

➝ New Speed = 60 km/h

➠ Distance = 25km

➠ Time taken = Distance ÷ New Speed

➝ Time taken = 25 ÷ 60 hour

➝ Time taken = (25/60) × 60minutes

➝ Time taken = 25 minutes

ANSWER :

Option (c) 25 minutes

Answer 2

Answer:

The correct option is (c)