Answer:
1 mile
Step-by-step explanation:
Joe = 6 mph
6 x 2 hours = 12 miles in 2 hours
Tera = 11 miles in 2 hours
12 - 11 = 1 mile
Breadth = 15 cm
Area = length x breadth
315 = 21 x breadth
[ dividing both sides by 21 ]
9 4/5 as a decimal is 9.8
x = 14
comp = add up to be 90
3x + 14 + 2x + 6 = 90
5x + 20 = 90
5x = 70