Question

plz answer question no.4
full solution needed​

Answer 1

a : b : c = 40 : 75 : 63

Step-by-step explanation:

a : b = 2/5 : 3/4 = 2/5 × 4/3 = 8/15

b : c = 5/7 : 3/5 = 5/7 × 5/3 = 25/21

Again, a : b = 8/15 =40/75 (Multiplying numerator and denominator by 5)

b : c = 25/21 = 75/63 (Multiplying numerator and denominator by 3)

Therefore, a : b : c = 40 : 75 : 63