Question
Write the algebraic expression for:
(i) The volume of cube if its side(a) is reduced by 5.
(ii) Simple interest if time is reduced by 2 years and rate is increased by 5%.
(iii) Distance travelled if speed is increased by 5 units and time by 10 units. [3 MARKS]
Answer: Option A
:
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Concept: 1 Mark each
(i) Volume
=(a−5)3
Here a is the initial length of the side of the cube.
(ii) Simple interest
=[P×(R+5)×(T−2)]100
P=Principal Amount
R=rate
T=Time
(iii) Distance = (s+5) (t+10)
s=speed
t=time
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