Question

At what rate percent will rs 2000 amount to rs 2400 in four years
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Answer 1

Step-by-step explanation:

answered May 11, 2019 by muskan15 (-3,443 points)

In first case :

P = Rs. 2400

R = x % (Assume)

T = 3 years

Interest = (P × R × T)/100

= Rs. (2400 × x × 3)/100

= Rs. 72x

In second case :

P = Rs. 2000

R = x %

(Rate same as in first case)

T = 3 years

Interest = (P × R × T)/100

= Rs. (2000 × x ×3)/100

= Rs. 60x

According to the statement

72x = 60x + 60

⇒ 72x – 60x = 60

⇒ 12x = 60

⇒ x = 60/12

⇒ x = 5

∴ Rate = 5%

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