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Question
Shabnam takes $$20$$ minutes to reach her school if she goes at a speed of $$6\ km/h$$. If she what to reach school in $$24$$ minutes, what should be her speed?
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Solution
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$$20$$ minutes time Shabnam takes to reach with the speed $$=6\ km/hr$$ $$1$$ minutes time will take a speed $$=6\times 20=120\ km/hr$$ $$24$$ minutes time will take with a speed $$=\dfrac{120}{24}=5km/hr$$
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