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GuDViN [60]
3 years ago
10

All triangles have at least 2 acute angles

Mathematics
1 answer:
katrin2010 [14]3 years ago
6 0
Correct
a right triangle will have 1 right angle and 2 acute angles.
an obtuse triangle will have 1 obtuse triangle and 2 acute angles.
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1. The ages of Sonal and Manoj are in the ratio of 7:5. Ten years hence, the ratio of their ages will be 9:7. Find the present a
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Ratio of present ages of Sonal and Manoj = 7:5

Let us consider the ages of Sonal and Manoj to be 7x yrs. and 5x yrs. respectively.

After 10 years, ratio of their ages = 9:7

A/q,  7x+10/5x+10 = 9/7

or     9 (5x+10) = 7 (7x+10)

or     45x + 90 = 49x + 70

or      49x - 45x = 90 - 70

or      4x = 20

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Therefore, present age of Sonal = 7x yrs. = 7 x 5 yrs. = 35 yrs.

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Step-by-step explanation:

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