Question

a man Travels at a speed of 30 kilometre per hour he is his destination 10 minute late and if he travel at a speed of 42 kilometre per hour he reach his destination and minute early the distance travelled is option a 36 b 35 c 40 d 42​

Answer 1

Answer:

option b 35 km is correct

Step-by-step explanation:

Let say Distance = D km

Time taken with 30 km per hr = D/30 hr

= (D/30) * 60 mins

= 2D mins

Time taken with 42 km per hr = D/42 hr

= (D/42) * 60 mins

= 10D/7 mins

2D - 10D/7 = 10 + 10

=> 14D - 10D = 20 * 7

=> 4D = 140

=> D = 35

option b 35 km is correct