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    Question

    A room 8 m long, 6 m broad and 4m high has 2 windows of

    2( 1/2) m m and 1m and a door of 2m 2(1/2) m. Find the  cost of papering the walls with paper 50cm wide at the rate of 1.50 paise per metre?
    A 275 Correct Answer Incorrect Answer
    B 312 Correct Answer Incorrect Answer
    C 324 Correct Answer Incorrect Answer
    D 315 Correct Answer Incorrect Answer

    Solution

    Surface area of four walls = 2(L + B) H                        = 2 (8 + 6)*  4                        = 112 m2 Area of 2 windows = 2 *3/2 = 3 m2 Area of door = 2 *5/2 = 5 m2 Wall paper to be papered = 112 – 3 – 5 = 104 m2 Paper = 50cm =  m Area of the papered = L* B 104 = L     L = 208 m Cost= 208  * 1.50 = Rs 312

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