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a daredevil in his motorcycle attempts to leap a 48 m wide valley. as shown below. at the side where he starts the ground slopes

a daredevil in his motorcycle attempts to leap a 48 m wide valley. as shown below. at the side where he starts the ground slopes upwards at 15 to the valley rim. Beyond the far rim the ground is level and is 5.9 m below the near rim.

What is the minimum speed needed for the daredevil to clear the valley ?

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