Question

cost of 1m sheet is Rs 12/5 the cost of 21/4 m is ?​

Answer 1

Answer:

Cost of 1 metre sheet = 15/5

Cost of 21/4 metre sheet = 15/5×21/4

= 315/20 = 15.75 rupees

Answer 2

Answer with Explanation:

Cost of 1m sheet - Rs. $\frac{12}{5}$

Cost of $\frac{21}{4}$m sheet = x

1 × $\frac{21}{4}$ = $\frac{12}{5}$ × x

LCM of 4 and 5 = 20

⇒ $\frac{21}{4}$ = $\frac{105}{20}$

⇒ $\frac{12}{5}$ = $\frac{48}{20}$

⇒ x = $\frac{105}{20}$ × $\frac{20}{48}$

⇒ x = $\frac{105*20}{20*48}$

⇒ x = $\frac{2100}{960}$

⇒ x = $\frac{2100/60}{960/60}$

⇒ x = $\frac{35}{16}$ = $2\frac{3}{16}$

⇒ ∴ The cost of $\frac{21}{4}$m of sheet is Rs. $2\frac{3}{16}$

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