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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.
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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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