Ms. Suba invests Rs. 46,875 at 4% per annum compound interest for 3 years.
Calculate (i) the interest for the first year (ii) the amount standing to her credit at the end of the second year and (iii) the interest for the third year.
Sunday, 9 February 2020
COMMERCIAL MATHEMATICS - PART - 09
Mr. Peter saves Rs. 5000 every year and invests it at the end of the year at 10% p.a compound interest. Calculate the total amount of his saving at the end of the third year.
COMMERCIAL MATHEMATICS - PART - 08
Mr. Kumar borrows Rs. 16000 at 10% compound interest payable every six months. He repays Rs. 5000 at the end of every six months. Calculate the third payment he has to make at the end of 18 months in order to clear the entire loan.
COMMERCIAL MATHEMATICS - PART - 07
Mr.
John borrows Rs. 40,000 at 12% C.I. If he repays Rs. 16,800 at the end of first
year and Rs. 19,360 at the end of second year, find the amount of loan
outstanding at the beginning of the third year.
COMMERCIAL MATHEMATICS - PART - 06
Mr. Raja invested Rs. 6000 every year at the beginning of the year, at 10 percent per annum compound interest. Calculate the amount of his total savings: (i) upto at the end of second year and (ii) at the beginning of the third year.
COMMERCIAL MATHEMATICS - PART - 05
Calculate compound interest due in two and half years on rupees 6000, at 10 percent compounded annually.
Saturday, 25 January 2020
COMMERCIAL MATHEMATICS - PART - 03
COMMERCIAL MATHEMATICS - PART - 03
CALCULATION OF COMPOUND WITH DIFFERENT INTEREST CALCULATIONS
TRIGONOMETRY - PART - 50 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS.
From the adjoining fig. find the value of sin x and cos y.
TRIGONOMETRY - PART - 49 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS.
In
the adjoining fig. AM is perpendicular to BC. If tan B = 3/4 and tan C = 5/12
and BC = 56 cm. Calculate the length of AM.
TRIGONOMETRY - PART - 48 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS.
Triangle
ABC is right-angled at B, D is the mid-point of BC, AC = 5 units, BC = 4 units
and triangle BAD is Ꝋ . Find the value of (i) tan Ꝋ (ii)
sin Ꝋ and (iii) sin^2 Ꝋ + cos^2 Ꝋ.
TRIGONOMETRY - PART - 47 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS.
In
the adjoining fig., triangle ABC is right-angled at B and tan A = 4 / 3. If AC
is 15 cm, find the lengths of AB and BC.
TRIGONOMETRY - PART - 46 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS.
If
3 cos A = 4 sin A; find the value of:
4
cos^2 A – 3 sin ^2 A + 2.
TRIGONOMETRY - PART - 45 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS.
If
cos A = 9/41; find the value of:
1
/ sin^2 A – cot ^2 A.
TRIGONOMETRY - PART - 44 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS.
ICSE
MATHS CLASS 9 – PAGE -294
EXERCISE
– 22(B) – PROBLEM – 35
In
triangle ABC, angle B = 90 degrees, AB = 40, AC + BC = 80. Find (i) sin A (ii)
cos A (iii) tan C.
TRIGONOMETRY - PART - 43 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS.
ICSE
MATHS CLASS 9 – PAGE -294
EXERCISE
– 22(B) – PROBLEM – 34
If
cos A = 2 (m n)1/2 / m + n, find the value of sin A (given m>n).
TRIGONOMETRY - PART - 42 - TRIGONOMETRICAL RATIOS - 100 PROBLEMS
ICSE
MATHS CLASS 9 – PAGE -294
EXERCISE
– 22(B) – PROBLEM – 33
In
triangle ABC angle C = 90 degrees, AB = 20 and BC = 12, D is a point in side AC
such that CD = 9. Taking angle BDC = x find
(i)
sin angle ABC and (ii)
tan x – cos x + 3 sin x.
Wednesday, 15 January 2020
DAILY TEN WORDS - HIGH-FREQUENCY WORDS IN ENGLISH - Z - LIST - COMPILED BY - ZENMURALI
31. zonk (v) fall asleep fast, as when one is extremely tired [adj – zonked]
34. zoophagous (adj) (of animals) carnivorous
37. zygote (n) the cell produced by the union of two gametes [adj – zygotic, adv – zygotically]
# ஜோங் (வி.சொல்)
வேலை முடிந்தவுடன் விரைவில் அயர்ந்து தூங்குதல்
# Hard labourers zonk after completion of their
work.
32. zoom (v) change the view
of an image so as to magnify or shrink it, e.g. when showing a picture on a
computer or changing the focal length of a camera lens [n – zoom, adj - zoomable]
# ஜூம் (வி.சொல்)
உருவகத்தை பெரிதாக காட்டு
# The police zoomed on the CCTV footage to investigate more
on the theft.
33. zoomorphism (n) the representation of animal
forms in decorative art or symbolism [adj
– zoomorphic]
தெய்வத்தை விலங்குருவத்தில் காட்டுதல்
# Zoomorphism was practiced by the Indians in
olden times.
34. zoophagous (adj) (of animals) carnivorous
மாமிச பட்சினிகள்
# Lions and
Tigers are zoophagous animals.
35. zoophobia (n) fear or dread of
animals
விலங்குகள் கண்டு இயற்கை மீறிய பேரச்சம்
# Children
generally have zoophobia, but eventually take them as pet animals.
36. zoophyte (n) any of various
invertebrate animals resembling a plant such as a sea anemone, coral or
sponge
செடி வடிவமுடைய விலங்கு வகை
# Worms are examples of a zoophyte.
# Worms are examples of a zoophyte.
37. zygote (n) the cell produced by the union of two gametes [adj – zygotic, adv – zygotically]
இரு பாலணு இணைவுப் பொருள்
# The zygote is the
first stage in the development of the fetus.
38. zymology (n) the science
dealing with fermentation [adj – zymologic]
புளித்தெழும்புதல், நொதித்தல்
# Zymology
contributes a lot to the brewing of liquor.
39. zymotic (adj) of or relating
to or causing fermentation; relating to or caused by
infection [n – zymosis,
adv - zymotically]
நொதித்தல் மற்றும்
தொற்று நோய் தொடர்பான
# Diphtheria
is not a zymotic disease.
40. zymurgy (n) the branch of
chemistry concerned with fermentation (as in making wine or brewing or
distilling); the practice of fermentation
வேதியலின் ஒரு பகுதி நொதித்தலாகும், புளித்தெழும்பும்
நிகழ்வாகும்
# Women prepare curd but do not know that it is due to zymurgy.
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