Question
Rinku has built a cuboidal water tank in his house the top of water tank is covered with an iron lead, He wants to cover the inner surface of the tank including the base with tiles of size 10 by 10 cm . If the dimensions of water tank are 180cm , 120cm , and 60cm and cost of tiles is Rs.480 per dozen , then find the amount required for tiles.
Explain how you got the FORMULA?
Q16
Maths
Feb. 9, 2018, 10:42 p.m.
Answer
A hemisphericsl bowl of internal diameter 36 cm is full of liquid.The liquid is to be filled in to cylindrical bottles of radius 3cm and height 9cm .how many bottles required to empty the bowl?
Maths
Feb. 9, 2018, 9:14 p.m.
Answer
In the given figure angle100 dgree where p,q&r are points on a circle with centre O.find angle OPR.
How to solve? ? 
plz solve this by substitution method