Math, asked by Srishti2006, 1 year ago

Can anybody answer 15,16

Attachments:

vishaalenerajapa1jjl: box B weighs about 12 kg

vishaalenerajapa1jjl: then box A weighs about 14.5 kg

Srishti2006: how

vishaalenerajapa1jjl: box C weighs 22.25 kg

vishaalenerajapa1jjl: he question sys box A weighs 2.5 kg more than that of B na... it means 2.5 + B .. same way for the box C 10.25+ B .. and let box B remain B... add them all now and subtract with the total weight 48.75

vishaalenerajapa1jjl: then u get the answer...

Srishti2006: plzz answer the question not incomments

vishaalenerajapa1jjl: m new to this app ... m exploring the features only now ... sorry for inconvenience...

Answers

Answered by princem123

16.)
Perimeter of rectangle = 240 cm (given)
Let the length of rectangle be x cm
Then, breadth =?
So,
Perimeter = 2(l+b)
Or, 240 = 2(x+b) here, b is breadth
Or, 120 = x+b
Or, b = 120-x
Now, length after 10% increasement
x+x×10% = 11x/10
And, breadth after 20% decreasement
(120-x) - (120-x) × 20% = (480-4x) /5
A/q
240 = 2{(11x/10)+(480-4x/5}
Or, 120 = (11x+960-8x/10)
Or, 1200 = 11x+960-8x
Or, 1200 = 3x+960
Or, 3x = 1200-960
Or, 3x = 240
Or, x = 80
Therefore, length of rectangle = 80 cm
Now, breadth =?
So, perimeter = 2(l+b)
Or, 240 = 2(80+b)
Or, 120 = 80+b
Or, b = 120-80=40
So, length = 80cm and breadth = 40 cm

Attachments:

Answered by Anonymous

A = 7/2 B
A:B = 7:2
C : B = 45 : 4
So A:B:C = 14:4:45
= 18 +45 =63 x
63x = 195/4 kg
X = 195/63 × 1/4
So 18x = 18 × 195 / 63 × 1/4
= 2 × 195 / 7 × 1/4
= 195/14
= 13 13/14 kg abswer

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