Consider the following features of newer models of motor cars 1.Radial tyres 2.Streamlined body 3.Multipoint fuel injection 4.Catalytic converter with exhaust Which of these features make the new models of motor cars more fuel efficient?

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Consider the following features of newer models of motor cars 1.Radial tyres 2.Streamlined body 3.Multipoint fuel injection 4.Catalytic converter with exhaust Which of these features make the new models of motor cars more fuel efficient?

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