Kiran starts at 9:00 am by bicycle to reach office. She cycles at the speed of 8 km/hour and reaches the office at 9:15 am. By how much should she increase the speed so that she can reach the office at 9:10 am?

Step-by-step explanation:

Given  data

speed = 8km/h

time taken= 9 am- 9:15 am = 15 mins

convert 15 mins to hours= 1/60*15 = 0.25 hrs

we can now calculate the distance

speed= distance/time

8= d/0.25

d= 8*0.25

d= 2km

now for Kiran to arrive in 10min (0.16 hrs), since the distance is 2 km

let us find the speed

speed= d/t

speed= 2/0.166

speed= 12.0km/h

Hence she needs to increase her speed by 12-8= 4km/h

answer: the answer is 23

step-by-step explanation: