Mahadevan's house is 4 kilometre from the school. He travels `2.75` kilometre of this distance in a bus and the remaining on foot. What distance does he walk?

Faisal travelled 3.75 kilometres on bicycle, 12.5 kilometres in a bus and the remaining distance on foot. He travelled 17 kilometres in all. What distance did he walk?

A man walks one and a half kilometres Is one hour. How many kilometres does he walk in one and a half hour at this 'speed?

Ravi's house is 90 kìlometers away from the railway station. If only he starts from the house at 8'o clock and reaches the. railway station at 9.30 by car he can catch the train. At what speed should car travel?

A child stands 30 metres away from the foot of a telephone tower, sees the top of the tower at an angle of elevation 30^circ . Stepping some distance towards the tower, sees it at an elevation of 45^circ a) What is the height of the tower? b) How much distance did he walk?