8. Find the product of (-4)x(-6)*(-5)*(-1) (09) m) SOLVE THE FOLLOWING (3 MARKS EACH). 9. A rectangular sheet of paper is 12 cm long and 10cm wide. Find its perimeter 10. Suman studies for 5-hours. She devotes 2 hours of her time for science and mathematics. How much time does 5 she devote for other subjects? 11. Arrange the following in ascending and descending order 2 2 8 9'3 21 (04) IV) SOLVE THE FOLLOWING (4 MARKS EACH). 12. In a class test (+3) marks are given for every correct answer and (-2) marks are given for every incorrect answer and no marks for not attempting any questions. (0) Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly? Mohini scores -5 in this test, though she has got 7 correct answers. How many questions has she attempted incorrectly? BEST OF LUCK
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Step-by-step explanation:
following in ascending and descending order 2 2 8 9'3 21 (04) IV) SOLVE THE FOLLOWING (4 MARKS EACH). 12. In a class test (+3) marks are given for every correct answer and (-2) marks are given for every incorrect answer and no marks for not attempting any questions. (0) Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly? Mohini scores -5 in this test, though she has got 7 correct answers. How many questions has she attempted incorrectly? BEST OF LUCK
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Answer:
Answer 8
-4 × -5 × -6
-4 × 30
-120
Answer 9
L = 12 cm
B = 10cm
Perimeter = 2(l+b)
= 2(12+10)
=2×22
= 44cm
Answer 10.
Total time Suman studies = 5 (2/3) = 17/3 hours
Time devoted for science and mathematics = 2 (4/5) = 14/5 hours.
The time he devoted for other subjects:
= (17/3) - (14/5)
= (17 * 5) - (14 * 3)/15
= (85 - 42)/15
= 43/15
= 2 (13/15) hours.
Therefore, the time he devote for other subjects = 2(13/15) hours.
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