A bus takes 1 hour 30 minutes to to cover a certain distance at a speed of 60 km/ hr . How much time will it take to cover the same distance when travelling at a speed of 45 km/hr?

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Solution

Dear student,

$T i m e t a k e n t o c o v e r t h e d i s t n a c e = 1 h r 30 m i n = 1 + \frac{30}{60} = 1 + \frac{1}{2} = \frac{3}{2} h r S p e e d = 60 k m / h r D i s \tan c e = S p e e d \times T i m e = 60 \times \frac{3}{2} = 30 \times 3 ∴ D i s \tan c e t r a v e l l e d = 90 k m S p e e d f o r 2 n d c a s e = 45 k m / h r T i m e = \frac{D i s \tan c e t r a v e l l e d}{S p e e d} = \frac{90}{45} ∴ T i m e t a k e n t o c o v e r t h e d i s \tan c e = 2 h r$

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