Plz answer me fast

Plz answer me fast Example 1/.• A boy dropped a pebble in the air from a height of 5 metres which fell and settled at the bottom ofa pond 10 metres deep. By how much distance did the pebble fall? So/whon.• Let the ground level be assumed at pomt zero. Highest position of pebble = +15 metres Lowest position of pebble = —10 metres Total distance difference between the highest and lowest position = [+ 15 — 10)) metres 15 + 10] metres = + 25 metres Exercise ID Example 12: Every floor of a 20-storey building m high. If a lift moves 2 m every second, how will it take to move from 3rd floor to 15th floor'! Solu'ion.• The starting point of the lift 3rd floor The finishing point of the lift = 15th floor The number of floors the lift climbed — 12 floors The height of each floor — S m Soive. So\ve. Total distance moved by the lift = 5 x 12 = 60 m The distance moved by the lift in one second — 2 m Time taken by the lift to move from 3rd to a 60 = — = 30 seconds. 2 J MrNair had 2500 in his bank on 01.01.2017. He deposited 1250 in January and February. What was Mr Nair's bank balance on 01.04.2017 if he deposited 500 and in March?