Rakhi travelled a total distance of $15 k m$ . If she covered $4 x k m$ by walk, $2 y k m$ by cycle and remaining by bus.The distance she covered by bus (in an algebraic expression) is_________.

(15 + 4 x - 2 y) k m

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(15 - 4 x - 2 y) k m

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(15 - 4 x + 2 y) k m

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(4 x + 2 y - 15) k m

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Solution

The correct option is B $(15 - 4 x - 2 y) k m$
$\Rightarrow$ Total distance Rakhi travelled $= 15 k m$ .
$\Rightarrow$ The distance Rakhi travelled by walk $= 4 x k m$
$\Rightarrow$ The distance travelled by cycle $= 2 y k m$
$∴$ The distance Rakhi covered by bus $= 15 k m - (4 x + 2 y) k m$
$∴$ The distance Rakhi covered by bus $= (15 - 4 x - 2 y) k m$

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Rakhi travelled a total distance of 15km. If she covered 4xkm by walk, 2ykm by cycle and remaining by bus.The distance she covered by bus (in an algebraic expression) is_________.

The correct option is B (15−4x−2y)km⇒ Total distance Rakhi travelled =15km.⇒ The distance Rakhi travelled by walk =4xkm⇒ The distance travelled by cycle =2ykm∴ The distance Rakhi covered by bus =15km−(4x+2y)km∴ The distance Rakhi covered by bus =(15−4x−2y)km

Rakhi travelled a total distance of $15 k m$ . If she covered $4 x k m$ by walk, $2 y k m$ by cycle and remaining by bus.The distance she covered by bus (in an algebraic expression) is_________.