Subject :IMO Class : Class 7
Every floor of 25 storey building is 5 m high. If a lift moves 2 metres every second, how long will it take to move from 3rd floor to 15th floor?
A 32 seconds
B 40 seconds
C 30 seconds
D 25 seconds
Ans 1:
Class : Class 7
C option, when you move up a storey there is distance of 5m and to find the time it take to reach fron 3rd to 15th floor is
15 - 3 = 12
12 * 5 = 60 metre
60/2 = 30 seconds
so, the answer is C seconds