17. Subtract the sum of (4x² + 7x + 9) and (-9x² - 8x - 7) from the sum of (11x² + 4x - 5) and (-9x² - 5x + 7)
18. Find the T.S.A and L.S.A of a cuboid having dimensions 25cm x 10cm x 35cm.
19.Find the difference between simple interest and compound interest on ₹12000 at the rate of 5%
per annum for 2 years compounded annually.
pls answer this 3 questions
class8
CBSE
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