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Gayatri asked in Math

Please help me thank you

Thank You
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Viram Jain answered this

Dear student,
Given,A bus left Town A for Town B at 8 am and a van left Town B for Town A at the same time.Average speed of bus=60 km/hr.Distance between Town A and Town B=520 km.The bus passes the van at 12 pmHence time taken=4 hoursDistance travelled by bus=60km/hr×4 hours=240kmDistance travelled by van=520-240=280 kmThe van covers the distance in 4 hoursHence,average speed of van=2804=70 km/hr.
 
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