Question

Hello guys,
could anyone please help me on this question i am a bit confused on how to write the working out. I know a=5cm and b=2cm. but if it is wrong then could anyone correct it please.

Answer 1

Answer:

your answer is alright

Step-by-step explanation:

first seeing the area of Rectangular pxys i.e 10 cm so from here we get

l*b=10

a*b=10

a=10/b so here we gets the value of a i.e 10/b

now seeing the area of Rectangle pqrs i.e 45

we will fille the value of a nd b

(a)*(7+b)=45

10/b*7+b=45

(70+10b)/b= 45

70+10b = 45b

70 = 45b-10b

70=35b

=>b=70/35

b= 2