A door of length 2 m and breadth 1.5 m is fitted in a wall. The length and breadth of the wall are 6 m and 3.5 m respectively. Find the cost of white-washing the wall at the rate of Rs 25 per sq. metre. (ii) Find the area of a rhombus if the length of its diagonals are 24 cm and 18 cm respectively.
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Answer:
Area for white wasing
= Area of whole wall - Area of door
=4.5×3.6−2×1
=16.2−2=14.2m2
⇒Cost=14.2×20
=284Rs.
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