In a pollution study of 1500 indian rivers the following data were reported
520 rivers were polluted by sulphur compound 335 were polluted by phosphate and 425 were polluted by crude oil 100 were polluted by crude oil and sulphur compound 180 by sulphur compound and phosphates150 by phosphate and crude oil and 28 were polluted by all three how many rivers were( 1)polluted by crude oil only (2)not polluted at all (3)not polluted by sulphur compound(4) polluted by only two impurities
Question
only doing tally entering purchase, sales etc.Ours is an Interior Furnishing company. How can we file returns under gst. can we get any demo
Maths
Oct. 30, 2019, 10:39 a.m.
Answer
- Find the value of k,the system of equation kx 3y=1,12x ky =2 ,has no solution.
- A traffic signal board indicating school ahead is an equilateral triangle with side a. Find the area of the signal board, using heron's formula. If its perimeter is 180cm what will be the area of the signal board?
Maths
Oct. 29, 2019, 11:11 p.m.
Answer
30. The shadow of a tower standing on a level ground to be 40m longer when the sun’s altitude is 30° than when it is 60°. Find the height of the tower.
