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A student rides his bike 7 miles from his house to school within 40 minutes, if he increases his velocity by 20 percent. when would he return home after class?
A student rides his bike 7 miles from his house to school within 40 minutes, if he increases his velocity by 20 percent. when would he return home after class?
40 min = 2/3 hour V1 = 7/ 2/3=21/2 = 10.5 miles/hr V2 = 120/100 x 10.5 = m/hr
Distance 1 (from house to school) = Distance 2( after school ride) = 7 miles V1 x T1 = V2 x T2 = 7 10.5 x 2/3 = 12.6 x T2 T2 = .56 hr (app.) = 30 minutes ( approximately)