Question
When Alisha goes by car at 50 kmph, she reaches her office 5 minutes late. But when she takes her motorbike, she reaches 3 minutes early. If her office is 25 kms away, what is the approximate average speed at which she rides her motorbike ?
Answer: Option C
Answer: (c)Difference of time= 5 + 3 = 8 minutes= $8/60$ hour = $2/15$ hourIf the speed of motorbike be x kmph, then$25/50 - 25/x = 2/15$$25/x = 1/2 - 2/15$$25/x = {15 - 4}/30 = 11/30$11x = 25 × 30$x = {25 × 30}/11 = 750/11$= 68.18 kmph ≈ 68 kmph
Was this answer helpful ?
Answer: (c)Difference of time= 5 + 3 = 8 minutes= $8/60$ hour = $2/15$ hourIf the speed of motorbike be x kmph, then$25/50 - 25/x = 2/15$$25/x = 1/2 - 2/15$$25/x = {15 - 4}/30 = 11/30$11x = 25 × 30$x = {25 × 30}/11 = 750/11$= 68.18 kmph ≈ 68 kmph
Was this answer helpful ?
More Questions on This Topic :
Latest Videos
Latest Test Papers
Submit Solution