Question

(b) 90 m/min
(c) km/min
2
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?
(a) 10 min
(c) 25 min
(b) 20 min
(d) 15 min​

Answer 1

Answer:

25min

Explanation:

let the distance be x.

so by formula speed=distance/time

firstly converting 30min into hours which is 0.5 hr

now using formula speed=distance/time

distance=25km

now speed is increased by 20%

20%of 50 will be 10

so now our speed is 60km/hr

again using speed=distance/time and finding time.

time will be 25/60 hr

converting it into minutes will be 25 min.