Answer:
54
Step-by-step explanation:
75% of 72 is 54
Answer is 2a + 8 because 2 times a is 2a and 2 times 4 is 8
SA=ph+2A, that is, perimeter × height+ twice area
p=21+20+29=70cm
h=22cm
70×22=1540cm
A=1/2 ×20×21=210×2=420
1540+420=1960cm2