Question

One-tenth of the bikes in a parking lot are
RED. Another bike arrives and now one-ninth
of the bikes are RED.how many red bikes and total bikes are there
​

Answer 1

Step-by-step explanation:

Given One-tenth of the bikes in a parking lot are  RED. Another bike arrives and now one-ninth  of the bikes are RED. how many red bikes and total bikes are there

• Assume the total number of bikes be x and out of which R are red in colour.
• According to question 1/10 of bikes are red.
• So 1/10 x = R
• Another bike arrives, so total number of bikes in the parking lot will be x + 1
• Now 1/9 of total bikes are red. So 1/9 is greater than 1/10
• Since Red bikes are 1/9 times that of total number of bikes after the new bike comes,  
• So the number of red bikes has increased and hence a red bike.
• Now total number of bikes = x + 1
• Total number of red bikes = R + 1
• So 1/9 (x + 1) = R + 1
• Also 1/10 x = R, So x = 10 R
• By solving we get
• So x + 1 / 9 = R + 1
• So x + 1 = 9 R + 9
• 10 R + 1 = 9 R + 9
• R = 9 – 1
• R = 8
• Also x = 10 R
•            = 10 (8)
• So x = 80

Therefore there were 80 bikes before the arrival of a new bike out of which 8 were Red. After arrival of new bike there were 81 bikes out of which 9 are red.

Answer 2

Step-by-step explanation:

Work is said to be done when a force applied on the body displaces the body through a certain distance in the direction of force. By resolving force →F into two components : (i) F cosθ in the direction of displacement of the body. (ii) F sinθ in the perpendicular direction of displacement of the body.