Question

A person travelled a distance of 71 in 9 hours . He trvellednpartly by foot at 4km/h and partly by bicycle at 9km/h. find the distance travelled in foot.with explanation.

Answer 1

Answer:

16 km

Step-by-step explanation:

• Speed by foot- 4 km/hr
• Speed by bicycle- 9 km/hr
• Distance- 71 km
• Time- 9 hr

x hr in foot and y hr in bicycle

• x+y=9 - total time

• 4x+9y=71 - total time
• x=9-y

• 4(9-y)+9y=71
• 36-4y+9y=71
• 5y=71-36
• 5y=25
• y=5 hr
• x= 4 hr

Distance traveled in foot= 4*4=16 km