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Rajat Kalyani

· started a discussion

· 1 Months ago

246609.0 (Question:246609.0)

Sir,path-lxb,my ans. Is 300

Question:
A rectangular lawn 60 × 40m2 has two roads each 5m wide running between the park. One is parallel to length and other is parallel to width. Cost of gravelling is 60 paise/m2. Find the total cost of gravelling?

Options:
A) Rs.285
B) Rs.300
C) Rs.275
D) Rs.270
Solution:

Area of path = x(l + b – x) 

= 5(60 + 40 – 5)

= 5 × 95 = 475 m2

∴ Total cost = 475 × \(\cfrac{60}{100 }\) = Rs.285


Knowledge Expert

· commented

· 1 Months ago

Dear student
Given answer is correct
Please solve the Question carefully
According to Question
Area of path = ( LxB) + ( LxB ) - ( lxb)
= (5 x 60) + (5 x 40) - (5x5)
= 300 + 200 - 25
= 475
Total cost = 475 x .6 = Rs 285

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