the length of a rectangular blackboard is 4 times its width if the width is 3m find its area also find the cost of painting rate 5 per sq.m
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Answer:
area=36 , cost of painting = 180 rupees
Explanation:
width=3
length=4x3=12
area=length x width
=3 x 12
=36
cost of painting=5
=5 x 36
=180 rupees
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Answered by
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Answer:
let l be the length of rectangular blackboard and b be the width of rectangular blackboard
according to the question : l = 4b
given that b is 3m, so l = 12m
area of rectangular blackboard = l×b
so area = 12×3 = 36
cost for painting the rectangular blackboard
= 36×5
=180 rupees
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