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5. A student reaches her school in 20 minuteswith an average speed of 12 km/h. If shewants to reach her school 8 minute earlier,her speed should be(A) 8 km/hr(C) 20 km/hr(B) 12 km/hr15 km/hr |
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Answer» Distance to be travelled= Speed*Time= 12*(20/60)= 4 kmsIf he needs to reach 8 minutes earlier, time = 20-8 = 12 minutes = (12/60) hoursSpeed= Distance/Time= 4/(12/60)= 4*5= 20 km/hr Please hit the like button if this helped you but i ticked 15km/ hr |
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