A courier-person cycles from a tower to a neighbouring suburban area to deliver a parcel to a merchant.His distance from the town at different times is shown by the following graph.(a)What is the scale taken for the time axis? (b)How much time did the person take for the travel? (c)How far is the place of the merchant from the town? (d)Did the person stop on his way?Explain. (e)During which period did he ride fastest?

What is the equation of the locus of a point which moves such that 4 times its distance from the x axis is the square of its distance from the origin?

The earth takes 24 h to rotate once about its axis. How much time does the sun take to shift by 1° when viewed from the earth?

The time taken by the light to travel a distance of 3 cm is :

Which of the following is true about a person suffering from myopia ?

What can you say about the motion of an object whose distance -time graph is straight line parallel to the time axis?

For an experiment in botany,two different plants,plant A and plant B were grown under similar laboratory conditions.Their heights were measured at the end of each week for 3 weeks.The results are shown by the following graph.(a)How high was plant A after (i) 2 Weeks (ii)3 Weeks? (b)How high was plant B after (i) 2Weeks (ii)3 weeks? (c) How much did plant A grow during the 3rd week? (d)How much did plant B grow from the end of the 2nd week to the end of the 3rd week? (e) During which week did plant A grow most? (f)During which week did plant B grow least? (g)Were the two plants of the same height during any week shown here?Specify.

Four years ago, the age of a person was thrice that of his son. Eight years later, the age of the person will be twice that of his son. Find the present ages of the person and his son.

A man sees the top of a tower in a mirror which is at a distance of 87.6m from the tower. The mirror is on the ground facing upwards. The man is 0.4m away from the mirror and his height is 1.5m. How tall is the tower?