Calculation: Let initial length of the LED strap = (5 + 4 + 3) = 12 unit So, initial price of the LED strap =122=144 Price, after cutting the LED strap =52+42+32=25+16+9=50 ⇒ (144 - 50) unit = 1880 ⇒ 94 unit = 1880 ⇒ 1 unit = 20 ∴ initial price of the LED strap = 144 × 20 = Rs 2,880