If 4a = 5b = 30, then 40ab = Choose the correct option
A) 900
B) 1800
C) 2250
D) 1650
E) 1250
4a * 5b = 30 * 30= 
<gadget id="calculator">30 * 30</gadget>
<output>900</output>
900   20 ab= 900   i.e. 30 ab = 1800   Answer: Option 1800
<result>B</result>
If 4a = 5b = 30, then 40ab =