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CBSE Class 9 Answered

A plastic box 1.5 long, 1.25m wide, and 65cm deep is to be made. It is opened at the top. Ignoring the the thickness of platic sheet, determine: 1). The area of the sheet require for making the box. 2). The cost of sheet for it, if a sheet measuring 1m saqure cost 20    
Asked by mskhan.aas | 21 Nov, 2018, 12:14: PM
answered-by-expert Expert Answer
Area = 2(l×b + b×h + l×h ) = 1.5×1.25 +2(1.25×0.65 + 0.65×1.5 ) = 5.45 sq.m
cost = 5.45×20  = Rs. 109
Answered by Thiyagarajan K | 22 Nov, 2018, 03:05: AM

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