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If the price of petrol, diesel and LPG is slashed as follows: Fuel Old prices/litre (in Rs) New price/litre (in Rs) % Decrease Petrol / L 45.62 40.62 ______ Diesel

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Question

If the price of petrol, diesel and LPG is slashed as follows:

Fuel Old prices/
litre (in Rs)
New price/
litre (in Rs)
% Decrease
Petrol / L 45.62 40.62 ______
Diesel / L 32.86 30.86 ______
LPG/14.2kg 304.70 279.70 ______

Complete the above table.

Chart
Complete the Table
Sum
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Solution

Fuel Old prices/
litre (in Rs)
New price/
litre (in Rs)
% Decrease
Petrol / L 45.62 40.62 10.96%
Diesel / L 32.86 30.86 6.09%
LPG/14.2kg 304.70 279.70 8.20%

For Petrol/L,

Old price = ₹ 45.62

New price = ₹ 40.62

Decrement in price = ₹ 45.62 – ₹ 40.62 = ₹ 5

∴ Decrease % = `5/45.62 xx 100`

= `50000/4562`

= 10.96%

For Diesel/L,

Old price = ₹ 32.86

New price = ₹ 30.86

Decrement in price = ₹ 32.86 – ₹ 30.86 = ₹ 2

∴ Decrease % = `2/32.86 xx 100`

= `200/32.86`

= 6.0869

= 6.09%

For LPG,

Old price = ₹ 304.70

New price = ₹ 279.70

Decrement in price = ₹ 304.70 – ₹ 279.70 = ₹ 25

∴ Decrease % = `25/304.70 xx 100`

= `2500/304.70`

= 8.20%

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Chapter 9: Comparing Quantities - Exercise [Page 297]

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NCERT Exemplar Mathematics Exemplar [English] Class 8
Chapter 9 Comparing Quantities
Exercise | Q 93. | Page 297

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