Last updated at Dec. 16, 2024 by Teachoo
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Ex 11.2, 9 A car takes 2 hours to reach a destination by travelling at the speed of 60 km/h. How long will it take when the car travels at the speed of 80 km/h?Given, If speed is 60 km/h, then car takes 2 hours to reach the destination. We need to find how long will it take to reach the destination if speed is 80 km/h Let the time taken by car be 𝒚 hours Thus, our table looks like As we increase the speed of car the time taken to reach the destination reduces (as the Distance remains the same) ∴ They are in inverse proportion 60 × 2 = 80 × 𝒚 (60 × 2)/80 = 𝑦 3/2 = 𝑦 𝒚 = 𝟑/𝟐 hours 𝑦 = 11/2 hours ∴ Car will take 𝟏 𝟏/𝟐 hours to reach the destination
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