Q. If A:B = 2:3, B:C = 4:5 and C:D – 6:7, then A:B:C:D is:
Simplify: a−4 × b3 × c5 × d−7a−7 × b−3 × c2 × d−9
If 47.2506=4A+7/B+2C+5/D+6E then the product of A and D is?