Question

A boy cycled at an average speed of 21km/h for 40 minutes. What distance did he cover? please give the answer quickly​

Answer 1

`we \: have \: avarage \: speed= (distance)/(time \: ) \\ here \: time \: is \: in \: \: minute \: convert \: \\ it \: in \: to \: hour \\ so \: (40)/(60) \: hour \\ = (2)/(3) hour \\ distance = avarage \: speed * time \\ = 21 * (2)/(3) = 7 ×2 = 14km\\ thank \: you`

Answer 2

☄Given:

• 
  `\sf{Average\:speed = 21km/h}`
• 
  `\sf{Time\:taken=40\:minutes}`

☄To find:

• 
  `\sf{distance=?}`

★Formula used:

`\boxed{Average\:speed=(Total\:distance)/(Total\:time\:taken)}`

★Solution:

`\bold{\underline{\underline{As\:we\:know\:all\:the\:units\:are\:in\:hr}}}`

`\rm{So,40\:minutes=(40)/(60)=(2)/(3)}`

`\sf{\underline{\underline{Now,putting\:values\:in\:the\:given\:formula:}}}`

`\rm{21km/h=(Distance)/((2)/(3))}`

`\rm→{21×(2)/(3)=Distance}`

`\rm{→14=Distance}`

______________________________

`\large{ \underline{ \overline{ \mid{ \rm{ \red{Answer→Distance=14\:\:km}} \mid}}}}`

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