Question
A car covers $360$ km at $60$ km/h. If its speed is increased to $90$ km/h, how much time is saved? / एक कार $360$ किमी $60$ किमी/घंटा से तय करती है। यदि उसकी गति बढ़ाकर $90$ किमी/घंटा कर दी जाए, तो कितना समय बचेगा?
Option 4 : $2$ hours / $2$ घंटे
Detailed Solution
सही उत्तर $2$ hours / $2$ घंटे है।
Time at 60 km/h $= \frac{360}{60} = 6$ hours; at 90 km/h $= \frac{360}{90} = 4$ hours. Time saved $= 6 - 4 = 2$ hours. / 60 किमी/घंटा पर समय $= \frac{360}{60} = 6$ घंटे; 90 किमी/घंटा पर $= \frac{360}{90} = 4$ घंटे। बचा समय $= 6 - 4 = 2$ घंटे।
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Question:
A car covers $360$ km at $60$ km/h. If its speed is increased to $90$ km/h, how much time is saved? / एक कार $360$ किमी $60$ किमी/घंटा से तय करती है। यदि उसकी गति बढ़ाकर $90$ किमी/घंटा कर दी जाए, तो कितना समय बचेगा?
Correct Answer: $2$ hours / $2$ घंटे
Time at 60 km/h $= \frac{360}{60} = 6$ hours; at 90 km/h $= \frac{360}{90} = 4$ hours. Time saved $= 6 - 4 = 2$ hours. / 60 किमी/घंटा पर समय $= \frac{360}{60} = 6$ घंटे; 90 किमी/घंटा पर $= \frac{360}{90} = 4$ घंटे। बचा समय $= 6 - 4 = 2$ घंटे।