Jane tried to fly her kite but discovered that the kite string was too short. if she doubles the length of the string, it will be 28 feet long

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!