For the following questions answer them individually
If a convex lens forms a real inverted same size image at 30 cm, then the object is placed _____ in front of the lens.
A sum of Rs.25000 amounts to Rs.32000 in 4 years. What is the rate of interest?
Find the least number that is divisible by 12, 18, 21, and 30
How is the ammeter connected in all circuits to measure current flowing in it?
In a certain code, 'HUNTER' is coded as 'UHNTRE'. How is 'MANAGE' coded in that code?
Simplify: $$\frac{\sin 3A}{\sin A} + \frac{\cos 3A}{\cos A}$$
In which part of the human ear is amplification of sound done by 3 bones?
Pure ghee costing Rs.100 per kilogram and vegetable oil costing Rs.50 per kilogram are mixed in some ratio and sold at Rs.96 per kilogram so as to gain 20%. In what ratio is ghee and oil mixed?
Which of the following is a use of ethanol?