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Answers
Answer:
(i) C.P. of the watch = Rs 540, S.P. of the watch = Rs 585
Profit = S.P. — C.P.
= Rs 585 — Rs 540 = Rs 45
Profit percentage = ( Profit/C.P. x 100) %
= (45/540 X 100 ) %
= 10/012 %
= 2/53 %
= 8⅓ %
(ii) llet the marked price of an electric fan be Rs. X
Mareked price - Discount = Selling price
Then, according to the question.
x - (x×9)/100 = 728
x/1 - 9x/100 = 728
taking LCM of dominators and solving it
(100x - 9x)/100 = 728
91x/100 = 728
91x = 72800
x = 72800/91
x = 800
show the Marked price of the electric fan is rupees 800
(iii) given digit number = 39
number we get by reversing the digit is sum of the numbers 39 + 93 = 132
sum of the digits of 39 or 93 = 9 + 3 = 12
to find the coefficient of 132 divided by 11
-¹³²- =12
¹¹
(iv) prime factors of 686 = 2 × 7 × 7 ×7
686 = perfect cube if × 2 or ÷ 2 = 1/2
the and make it has perfect cube is 1/2 or 2 number in which 686 is divided
Step-by-step explanation:
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