Question

Case Study Based Questions :- Q.13 Raj and Ajay are very close friends . Both the families decides to go to Ranikhet by their own cars . Raj’s car travels at a speed of x km / hour while Ajay’s car travels 5 km / hour faster than Raj’s car . Raj took 4 hours more than Ajay to complete the journey of 400 km . (4 1 = 4 marks ii) Which of the following quadratic equation describe the speed of Raj’s car ? a) x² – 5x – 500 = 0 b) x² + 4x – 400 = 0 c) x² + 5x – 500 = 0 d) x² – 4x + 400 = 0
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Answer 1

x² – 4x + 400 = 0

• Speed of raj's car is 20 km/hour

• Ajay took 16 hours to cover 400 km