Mounting a hard disk image with partitions

$ file mydebian.img
mydebian.img: DOS/MBR boot sector

$ fdisk -l mydebian.img

Disk mydebian.img.141022: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders, total 83886080 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00094e94

                   Device Boot      Start         End      Blocks   Id  System
mydebian.img.p1            2048    81790975    40894464   83  Linux
mydebian.img.p2        81793022    83884031     1045505    5  Extended
mydebian.img.p5        81793024    83884031     1045504   82  Linux swap / Solaris

$ mount -o loop,offset=$((2048 * 512)) mydebian.img /mnt

References :
Mounting a hard disk image including partitions using Linux | andremiller.net
Loop-mounting partitions from a disk image