Practice Question and Answer
8 Q: A and B start moving from places X and Y and Y to X, respectively, at the same time on the same day. After crossing each other, A and B take $$5{4\over 9}$$ hours and 9 hours, respectively, to reach their respective destinations. If the speed of A is 33 km/h, then the speed (in km/h) of B is:
913 064d21006ebd5c374726dd95f
64d21006ebd5c374726dd95f- 122false
- 22false
- 3$$25{2\over 3}$$true
- 4$$24{1\over 3}$$false
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Answer : 3. "$$25{2\over 3}$$"
Q: The sides of a triangle are in the ratio 2 : 3 : 4. The perimeter of the triangle is 18 cm. The area (in cm2) of the triangle is
895 064d238b9eb9b4274b35438e4
64d238b9eb9b4274b35438e4- 19false
- 236false
- 3$$ \sqrt {42}$$false
- 4$$ 3\sqrt {15} sq.cm $$true
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Answer : 4. " $$ 3\sqrt {15} sq.cm $$"
Q: Each side of an equilateral triangle is 6 cm. Find its area.
842 064d239f50df042748fa6d41e
64d239f50df042748fa6d41e- 19 √3 sq.cm.true
- 26 √3 sq.cm.false
- 34√3sq.cm.false
- 48 √3 sq.cmfalse
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Answer : 1. "9 √3 sq.cm. "
Q: If the numerical value of thes perimeter of an equilateral triangle is $$ \sqrt {3}$$ times the area of it, then the length of each side of the triangle is
716 064d23923eb9b4274b3544aae
64d23923eb9b4274b3544aae- 12 unitsfalse
- 23 unitsfalse
- 34 unitstrue
- 46 unitsfalse
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Answer : 3. "4 units "
Q: The area of a right-angled isosceles triangle having hypotenuse 16√2 cm is
735 064d23868ebd5c374726efcd1
64d23868ebd5c374726efcd1- 1false
144 cm2
- 2true
128 cm2
- 3false
112 cm2
- 4false
110 cm2
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Answer : 2. "128 cm2
"
Q: The area of two equilateral triangles are in the ratio 25 : 36. Their altitudes will be in the ratio :
632 064d2380180ef1e74b4cab457
64d2380180ef1e74b4cab457- 136 : 25false
- 225 : 36false
- 35 : 6true
- 4√5 : √6false
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Answer : 3. "5 : 6"
Q: From a point in the interior of an equilateral triangle, the length of the perpendiculars to the three sides are 6 cm, 8 cm and 10 cm respectively. The area of the triangle is
793 064d2378cebd5c374726ede85
64d2378cebd5c374726ede85- 1false
48 cm2
- 2false
16√3 cm2
- 3true
192√3 cm2
- 4false
192 cm2
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Answer : 3. "192√3 cm2
"
Q: In an isosceles triangle, the measure of each of equal sides is 10 cm and the angle between them is 45°. the area of the triangle is
581 064d2373290a003851dda5a10
64d2373290a003851dda5a10- 1$$25 \ cm^2 $$false
- 2$$ {25\over 2}\sqrt { 2}cm^2 $$true
- 3$$25 \sqrt { 2} \ cm^2$$false
- 4$$25 \sqrt { 3} cm^2$$false
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