Question

48. Walking with a speed of 4 km per hour, Hamid
reached his school 12 minutes late. On the next
day he left his house at the usual time and walked
at 5 km per hour. It he reaches his school in time,
what is the distance of his shcool from his house?​

Answer 1

Answer:

5 km

Step-by-step explanation:

Letthedistancefromhometoschoolbedkm.Thentimetakenatthespeedof4km/hrist1=4dhr.Andtimetakenatthespeedof5km/hrist2=5dhr.∴t1−t2=(4d−5d)hr.=20dhr.−−−−(1)Inthefirstcaseheislateby5min.andinthesecondcaseheisearlierby10min.∴Differencet1−t2is[10−(−5)]min.⇒t1−t2=15min.⇒t