Time difference between London, UK and Mumbai, India is: 5:30 hours. Mumbai is 5:30 hours ahead of London. When it is 9:00 am in London, it is 2:30 pm in Mumbai.
Size of files in Windows OS. (It's KB or kB?) One kilobyte (KB) is 1024 bytes in JEDEC-standard, whereas the definition has shifted, in most contexts, to mean 1000 bytes (kB) in accordance with SI. To resolve this difference, binary prefixes (kiB) are used. So we have 3 choices for using prefixes - JEDEC, IEC (both in Binary), and Metric (in Decimal).
No, a kilobyte is 1024 bytes, a MB is 1024*1024 bytes = 1048576 bytes. MB (MegaByte) is much bigger than KB (kilobyte). One MB = 1024KB. You may wonder why multiples of 1024 are used rather than 1000. After all, the prefix kilo- means 1000.